I'm having trouble getting into this. The game seems very very top level strategic and not as deep into tactics as I initially thought.
I think it's chock full of tactical considerations, but you need to understand the game's nuances and have experience playing it before you get to that skill level. The strategy and tactics are very important when human players are involved.
Do keep in that the Beta is far from the finished product. All sorts of balance changes are likely to occur. Right now many playtesters are concerned that the titans are very overpowered or not expensive enough.
It seems like the optimal way to play is fully zoomed out for empire management and fleet deployment.
I spend most of my time at gravity well level--having an overview of a particular gravity well where I'm positioning the ships or ordering the construction of structures. It's the tactical view level. I also spend time zooming out to look over the local area of the map and the overall map. I almost never zoom in to see the pretty graphics unless I'm really bored (that's mostly for people in single player who can slow it down and who are playing less intense games).
It also seems like unit mix isn't actually that important and that it's much more important to have overall power/numbers superiority and focus on one or two core units and upgrade them to the gills.
You have to try to counter what your opponent is building. If my opponent is focusing on one unit type, I'm going to build the counter. Support ships are also important; you really do want to have a mix. Your fleet might consist of 1 or 2 capital ships, 75% of your damage-dealing workhorse unit (probably long range frigates) and then support ships (like Hoshikos or Guardians and strikecraft carriers). You'd probably want some flak frigates too.
The strategy is actually very deep and challenging once you get into it. It's not just about fleet composition, but about making decisions about whether to invest in economic development or having a large fleet and to what extent, where and when to attack, what to defend, what technologies to research, etc. It all gets fleshed out in online multiplayer PvP.