First this is an old game.
Second no one has yet to follow where they went.
I am not going to give a game review but give a review of why no one has followed its foot prints.
The games give 3 factions in that it follows others but where it changes is that each faction has a strong point. The lurnar group is hover low armor/high shield output, the ED are heavy tanks with high armor/low shields, and the UCS are robot mechs with a med armor/shield output. This gives a 3 factions that play in their oun way.
The vehical system is where this game blows the rts walls open. Make a vehical tha way you want it not the premade idea some one thought up. Like rockets add that to the tank, like heavy guns change it to heavy guns then build it. Want a combo? Yea heavy guns with a rocket on top, it dose that(for real!!! best tanks for ED) The weapon combo system with a med weapon system added on top of a large weapon makes for vehicals that are your liking.
Then they put ammo in, you need to reload your vehicals with air drops from cargo choppers linked to supply depo's. With energy weapons needing time to recharge, lasers, spark cannons, sonic guns(hate that aoe), it makes for a good balance.
Save your crew, this isnt much in the muti player but in any campaign if you keep units alive you can transport them back to a main base and reuse them on the next mission. This leads to the exp, as you keep units alive they make kills and gain more armor,hp, and damage with each lvl. The quick way to see this is make a unit with a banner, it adds 2 lvl's to units around it, very use full early but wont add past lvl 4 if a remember right. This will show give an example of the added damage/hp a unit has at higher lvl's. The next thing is a unit that will let you upgrade units with new tech, better shields ready add it on and upgrade it. Some units you cant, but that up to you to find them the starting unit types.
The game was ahead of its time and I dont think any rts has come close to following the way it plays. The line that describes the game with 150 missions and 9 campaigns is true but thats ED,UCS, and LC X3 games so each game has a campaign for each group. I would start with ED on ESCAPE FROM THE BLUE PLANET to learn the game, it has the easy start, the UCS and LC through you in.
The bugs are mosly sceen size issue's, the game wasnt made for todays HDtv screens/widesceen issues, search for the fix its out there.