Other product, like Bitdefender, caused me serious issues long ago.
Bitdefender is one of the buggiest av product you may get out of the blue. It has great sig but it fails on many other ground. I once tried their extended trial. & I was not only just shocked but also astonished by its mediocre build. Its module used to get disabled on its own, its firewall wasn't that impressive. I don't know whether they have changed or not... I'm part of an intranet which is full of hackers & I need a stable & robust firewall not a puny one. I still don't prefer to get back to BD again. Btw,I love their database but in real world database alone ain't enough.
Minor GUI issues are bearable.
& regarding kaspersky's gui change, it's most likely there will be much more gui changes in the future. As I tried their 2020 beta product & saw some changes in that though that was pretty early released beta.
harlan4096 may provide you much more info about this, he is a gold beta tester
, I do check their beta products ocassionally.