Played it. Like it a lot. Nowhere near as good as SC2.
Starcraft 2 isn't supposed to be realistic. The reason SC2 is so good is because of the insane amount of different strategies and combos possible. Aside from the insane ghost/mothership combo here are a few other ridic strategies that totally work, just to name a few.
1) Build barracks, factory, and starport immediately before even getting a supply depot. Get one banshee with cloak out as fast as possible, before they have detection or anti-air. Rape with a single unit.
2) Rush reapers against a zerg fast expand, send your first reaper with an SCV. Distract with reaper then build bunker right next to their FE, get the reaper in it, GG you already won.
3) Put a pylon at the bottom of a Terran player's base, energy field reaches to the top of the cliff, warp in Dark Templars FTW
4) Get Thor's and Medivacs. Get about 3 of them with their upgrade ability that does stupid damage. Drop in back of opponents base, 1-shot their HQ, and fly away before they even notice.
5) TvZ, get one of each kind of building. Reaper harass in to hellion harass in to banshee harass into dropship/hellion harass.
6) Ghost nuke offensive vs zerg.
Just a few of the gnarley crazy strats that have surfaced in the beta.
Also CoH is nowhere near as crazy technical when it comes to micro/macro. And of course, custom games. Blizzard custom games just cannot be matched.