I may be a bit biased, but I'm a big fan of Frozen Synapse and am biased toward liking Prime as well.
With that said, given the 50 percent off coupon, and two copies of the game, it is more than worth the price for anyone who is a fan of the original.
The primary improvements, in my opinion are this:
- Units have "weight;" a feel that they are actually impacted by gravity. In other words, when you turn, it isn't some 180 degree in a millisecond trick. You have to actually turn. This requires more planning and thought for checks, rounding corners, etc.
- In the original synapse (with the Red DLC, actually) were mutators. FS Prime has smartly integrated the Focus Aim and Double Kill ones. WIth Focus Aim (called Sweeping Aim in Prime, if I recollect correctly), every unit can choose whether to aim in the classic sense (facing in a direction and continuing to do so until orders change), or in the Focus fashion, which locks the aim to a single point rather than a direction, thus allowing units to move and remain aimed at the dictated point. This is a far better way of handling this feature than making it all or nothing as it was in the original. As for Double Kill, it is now the standard. All things being equal, two units squaring off will both die if there is no particular advantage.
- Balancing the power of weapons: In FS, shotguns were unbeatable if coming around a corner against an MG. Not so much now. Now any unit will defeat any other unit, or both will perish, in more realistic fashion. If I'm an MG unit and I'm sitting in a room pointing at the door, and a shotgun rounds the corner, I am going to get the jump on him with my trigger, one would think. Now that is the case. I don't have to square off, look down my scope, etc. at that short range, so it only makes sense that I'd fire quickly from the hip and head home for glory. This does not mean that shotties aren't more deadly at close range, faster moving, etc.; they are. Now range just isn't the only factor.
- Match creation has become much more straight forward. There are preset squad setups, as well as the expected random and player defined ones. Maps are easy to resize, and the amount of cover, windows, doors, and state of the walls on a map are all easily definable. Changes to these elements are reflected in a quick loading preview.
- No more Global Elo! This is, unfortunately, both good and bad. The Elo system is brutal on high ranked players, and morever, nobody on the planet Earth fully understands how it calculates. However, while Prime keeps things much simpler, the one downside is that it is based purely on points from all matches played. So, the unemployed guy who plays all day, if good enough to win more than lose, will likely be king of the hill into eternity.
There are a number of very nice details and changes, and this review is long enough already I suspect. There are some bugs as well, but from my very brief experience so far, Double Eleven is listening to the community and attempting to address all feedback, concerns, and issues. Unlike Mode7, they seem to actually act on their words. I hope it stays that way and the various bugs get fixed in a timely fashion.
The final buy or don't buy is really very simple:
If you love Synapse and want the same game in a slightly updated and interesting fashion, this is a must, especially at the $10 for two copies price right now (until Nov. 21, 2014).
If you are not a real fan of the original game, and the reason is not because of the top-down only, dullish, graphics, then you won't want to spend your money on this either.
I personally enjoy it, and even though point rankings aren't that important, given the hope for upcoming patches, I'd have to offer up a 7.5 out of 10, maybe even an 8.