If you try to use dots for animated characters, you are going to have a fun time with their experimental dots animations system
My point is that their SRP batcher already solves most of the CPU side bottlenecks and DOTS isn't helping with anything other than heavy gameplay logic, but then you end up with terrible animations, no ucclusion culling and so on. That's what Cities Skylines struggled with.
They are adding new GPU resident drawer which is supposedly similar to DOTS hybrid renderer, which I have already tried with no benefit. Also, there is already progressive GC and I've never seen GC lags since it was added. GPU optimization is where the devil is, CPU is easy (from my Tech Art side).