Most campaigns feel very similar to me on a tactical level, am I missing something?

It's likely I'm missing something, I'm not a very experienced player but I feel the tactical battles are extremly similar due to a lack of unit variety.

What I mean by that is that most campaigns which I played consist of:

- Infantry against Infantry - Infantry against Large - Shock Cavalry - Missile Cavalry - Missile Infantry - Hybrid Missile Infantry

There is some more units of course, but I feel like generally the shock cavalry from the empire plays the same as the shock cavalry of the high elves, just with some different stats.

Now every faction has some more unique units, but I feel like usually the vast majority of my army consists of the more generic unit types.

Would you say my observation is accurate or am I missing something that adds tactical depth between two units of the same type?