I have to say... this game has had me hooked more than Avengers Alliance.
Both are great games, but Tactics seems less monotonous because of the locations and Heroclix/Final Fantasy Tactics gameplay.
A few thoughts...
Looks like this was a victim of the "no Fantastic Four" push. Which is really sad. We finally can have four characters in a team and we can't use the FF. :-(
A lot of the abilities from Avengers Alliance ported over surprisingly well with Tactics. However, the Infiltrator's Combat Reflexes either has been changed to only counter Tacticians or something's wrong with it.
I like the ability training and skill slotting. Great way to add customization to the game and more variety.
I hope we get interactive objects, like things to throw or blow up for area damage.
Shield points take forever to gain. Especially right now
And, again, I like that we have Shield Agents to use.
Some important info:
Pay attention to the mission objective. Sometimes you only have to take out the main bad guy. And I haven't seen a difference in experience for taking them all out.
Toy with character abilities. Some things are best learned by exploring.
For instance, Black Panther has an attack that basically doubles his speed. But you wouldn't know it by reading the description.
On the Dr. Doom mission, with the servo bots and Doom doing his spellcasting, take as many long range characters you can. Then place all your heroes in the crater in the top left of the map. This limits the servobots to range attacks which are considerably less powerful. Pick them off on by one until you take them all out.