Well, unless Thompson can serve her team out from 5 down during a tie break, I don't think she'll ever near Egonu or Boskovic level.
It takes more than carrying a scoring load.
Goncharova have pretty much hit a road block because of her weak serve and in my opinion, that's as far as Thompson could ever go. Not that it's bad or anything because Goncharova is a very good opposite but not enough to win games on her own like Boskovic or Egonu.
First of all, I am sorry, being off topic. I agree with you on this, but we should not forget Egonu (21y.o) and Boskovic (22y.o) is younger than Goncha. Goncha is 30y.o now. If you compare Egonu/Bosko with Goncha when she was 21/22, yes still they are better than Goncha imo.
OTOH, I have to admit that Egonu and Bosko's teammates in their NTs are better Goncha's teammates. Goncha scored 35 pts against USA in WCH 2018 but it was not enough because her teammates didn't contribute a lot. It was not her fault. I don't think Egonu and Bosko win the games on their own, reception, defence of Serbian/Italian NT is better than Russian NT. Not to mention, how perfect is Maja's sets to her teammates. When she was in D.Moscow, Fetisova contributed a lot and even D.Moscow defeated Vakifbank in CL last year.