I didn't really mean that dodging grenades is the only thing you need to do well, but that microing is the most important skill to have and nade dodging is just one of the more difficult things to micro. Unit preservation does matter too, but that just comes naturally with micro and awareness.
As far as strategy goes its almost non existent compared to what there was to consider in vcoh. Very few unique doctrines, counterpicking is almost completely dead since you can't even identify them anymore, and teching is extremely linear and predictable. I remember once upon a time a decent strat guide accounted for almost every contingency and the way you played it could vary greatly from game to game. Now its just a doctrine with a list of units, with the only variable being the order in which you buy certain things.
I don't think teching is linear at all. German players can go T1 T2 T4, T1 T2 T3, T1 T3, and fast T2 (although its kind of crappy imo). Soviet players can skip T1 or not skip T1, and then choose to go fast T3 and then backtech to T2 or go to T4. Going T1 T4 is also a viable choice. The choice between a fast T70, or going T2 and getting mortars/maxims, or going T1 and getting snipers, or going gaurds, shocks, the 120mm, going T1 T2 and using T34/85s... I feel like there's a lot of choices that are better or worse depending on the map and your opponents build.
The doctrines sadly do not work like vCoH, it's true. But there are going to be new doctrines every month, supposedly so who knows what the doctrinal meta will look like in 6 months.
And as far as the OP and the nade discussion: I like the nades. It raises the skill ceiling and I don't think you can throw nades indiscriminately and not miss out on things like a fast flamer HT, more mines, etc.