Yes, there is strategy involved, realistic battle tactics. This game should not be classified as one for RTS noobs.
No, you don't collect resources or build a base, but if you think it lacks strategy because those two elements are missing then you're sadly mistaking. In this game you play the role of a field commander of one of four military divisions. So, let me ask you something, when was the last time a commander ever sent out ore trucks to collect resources in order to produce more units in real life? Catch my drift?
This game takes the direction of a battle simulation type of RTS. The strategy comes with the teamwork and how you manage your units, with the emphasis mainly on teamwork. High ground is important, flanking is important, setting up proper ambush points, scouting the enemy, countering with the proper units, etc are all elements of strategy present within the game.
Coordinating attacks with other divisions of the military provides an extra sense of realism and strategy that no other game has ever delivered. Besides, isn't this the way it's done in real life, typically at least?
There's also a lot of micro to the game, such as properly using smoke screens and other special abilities, attacking the rear of enemy armor, many things of that nature.
If you're grabbing a bunch of units and just throwing them into the mix, you're going about the game the wrong way. You have to use teamwork and plan out your attack much like a commander would in real life. I'm not saying that this game is pure simulation, but relatively when compared to other RTS games it is.
The game is different, learn it before making false assumptions.