I wrote a review for this a while back, and I can say with confidence many issues have been sorted out, but some are still persistent.
If you have never played this game, I am going to say right now to buy this game and play it. The campaign and its storyline is great, the factions are unique and well fleshed out and balance, for the most part, is achieved with some minor discrepencies/exploits which with experience can be learned to be countered.
I will say that the game is not in its glory days anymore as this IS a re-release of a fairly old title. But the multiplayer is also active enough to have a competitive community and there is a revival in the scenario community to experience a taste of the legacy of AoM mapmakers, I suggest looking on http://aom.heavengames.com/downloads/
for more or the Steam workshop downloads provided.
But lets start with the actual meat of the game for anyone reading for determining whether to buy this:
The Extended Edition brings many new improvements over old Age of Mythology and the Titans expansion included, water and other graphics are overhauled and improved significantly. Graphics in general have been improved over the original and the game looks much more vibrant and detailed. This makes playing the singleplayer campaign, which is still one of the better campaigns of an RTS I have played, much more enjoyable.
A new online server is also available for multiplayer gameplay and while its nowhere even close to the glory days of ESO in terms of activity and the amount of scenario makers, some old faces are there both in competitive gameplay and with old mapmakers, and some newer map makers such as myself have been sprouting up. In terms of connection these days it really depends on whose actually in the game but as long as you're computer isn't a toaster your connection and running of this game should go forward without a hitch.
However there is still some bugs that are highly irritating that remain. Desync errors still happen too frequently for my tastes and this wouldn't be so much a problem if it didn't lower the rating of those involved in ranked matches. When someone is on the verge of victory and then a desync error occurs to make them lose rating... its understandable someone would be angry.
There is also more visible lag and connection issues between players then there was on the old AoM in certain instances, such as on certain scenarios or with people with very bad connection to begin with. And the Extended Edition is notable in how it actually lags your computer- some of us may remember we could browse the internet with Age of Mythology running in windowed mode or running other programs while we wait for a game; while this isn't prevented and is still possible the speed of which you do so is stifling and I would not recommend it at all now. (Nor would I recommend it in matches even back then, but if you're in lobby just idling, waiting for your friend to host that game...)
I suggest if you are buying this, do not play on your toaster or similar dinosaur computer, this is an updated version of Age of Mythology meant to be played on semi modern machines.
And as for scenario editors who wish to return to making maps for this game: The online multiplayer community is in desperate need of scenario revival. There is scenarios still being played from time to time but the newer population of competitive players is either unaware of most of the maps or simply do not host them, mostly the former. As for the editor itself, for all intents and purposes its more or less the same as what we know, but there is some notable differences now.
The differences boil down to some old trigger techniques not working, and now causing horrible lag. The old trick of looping Move Army To to move your spawned units to a location, looping it within the trigger editor now causes horrible lag and no longer just simply makes them keep moving there. It acts as if the computer stops their units and tells them to move there, acting as if the loop was just restarting and stopping the order instead of merely continuing it as it did in the past.
There is also UI changes to the editor, and while the function is largely the same it takes a bit getting used to. I can say with confidence though the editor is still fairly user friendly and easy to learn, though trying to find experienced mappers to help you with your project is a little difficult in terms of looking on the lobby- you'll have to consult various forums like AoM heaven or pitch it on the steam forums for this game somewhere. I myself can help with things too, and even old legends like Nottud are still around if you look...
So it boggles down to this, overall: Should you buy this game if you are new, and should you buy this game if you already have age of mythology, the original and its expansion, to relive your nolstalgia?
If you are new, refer to the top. Yes.
If you are an old and musty returning player like me, Yes, but don't expect it to be total brass and shine throughout the entire game. There is some grime to be worked out with this still but I can say with confidence there has been legitimate work and attention on this game to improve it and fix bugs.
(p.s Potato, if you review my review im going to shoot you and feed you to a chimera, not only was your review pointless, it was awful in its critique and if anything uninformative. No one cares about grammar to that extent, it's all about presentation, and the clarity of my review was fine. That is all :D )