(1) Their were actually a couple of interesting first-time boss fights. Well only 5, but hey, it's something.
(2) Banelings, banelings, banelings, BANELINGS!!!!
(3) Infested Kerrigan is OP beyond belief. I don't bother using my units offensively, I only use them defensively.
(4) More cinematics is good, on the same amount of Warcraft 3. But nothing beats Warcraft 3 in CGI cinematography.
(1) Rush, rush, rush. No planning, strategy, macro or anything. Just send masses of flesh at the enemy until a planet size of dead zerg drowns them.
(2) Almost all Zerg units are mostly novelty and obsolete, and were purposely designed and made exclusively to work well only in the map they were introduced in.
You could say use 20 broodlords to win a map, but why bother wasting 20 minutes doing that (Time to make + their slow movement and attack speed) when you can spawn and make 250 banelings within 3 minutes can do the same thing and still have a 100 leftover at the end?
(3) 20 missions hardly sates my appetite, and repeating the campaign has hardly any replay value.
All I can find myself doing is competing on "Completion Time", "Units Lost" and "Achievements".
At Least in WoL I was trying different things like Medivac/Hercules drops instead of breaking down the front door. (Can't pick up units in HotS or use Nydus Worms... why?)
(4) The whole thing about Broodmothers contacting you (Possibly more missions, because we had control of one on the Protoss ship.), felt like it was scrapped and replaced with a cheap dialogue (Why bother putting it in the first place then?) very quickly near the end of production.
(5) To much chatter in the end cinematic. If Kerrigan was really that interested in killing Mengsk, she would of done something immediately instead of waiting for him to use the Xel'Naga artifact with feigned surprise.
Even while on the floor, she decided dieing would be better instead of attempting to fight back.
Still don't know why Raynor didn't pop a couple of bullets in Mengsk, since he didn't, obviously like Mengsk at fracking all. Instead they give him a clean merciful death for "all the lives you have ruined".
(6) Narud must of been cast off from the world of Diablo 3 (They thought he was to evil and scheming), because he was more interesting and more badass than the "Lords of Hell" but his death still wasn't all that interesting. Because of his direct involvement (Literally the father/mother) of the Hybrids. One might think he would have Hybrids or something else helping him defend himself from Kerrigan. (Like one epic boss fight or something? Did that concept run through anyone's head when they watched the cinematic fight between them? I really did want to rip the guy's the head off myself.)