So, in an attempt to love the new Studio 2017 (which does have many shortcomings already noted elsewhere), I am now trying to tackle the issue of significant lag which occurs while typing or switching between segments. The new Studio's fluency is nowhere near the 2011 version I have used for years. The input lag increases with the amount of text entered in a segment. I have already observed this behavior in 2011 on another PC, but the effect was much smaller there.

Which of the unnecessary-anyway features should/could I disable to eliminate the lag?

Btw. my system is a 2017 Intel i5 machine, and I am convinced it is capable enough in terms of hardware. MemoQ trial works flawlessly.