I don't think the coverage is quite up to the standards of the days of Sideshow, Gecks, DavidTheWin, Admirable etc yet but I think it'll definitely get there eventually with the majority of casters/producers we have right now constantly learning and improving. Due to lack of star talent I think anyone who is volunteering and actually trying is doing a good enough job at this point in time, so I'll echo this:
WFlashTurboTabs, Beater, gemm, Nuze, zeFrosty, Hiipfire, etc... you all are doing God's work, keep it up please :)
Unfortunately as much as Gubbins was harsh in his analysis, I do agree with the vast majority of his criticism; casters should be held to account when they're not bothering to do their job properly and are just turning the coverage into a memefest. I really feel like it's quite disrespectful to the players, viewers and community in general when you're not at least trying to be as professional as you can. It also probably deters sponsors and other people from volunteering when there's a lack of professionalism.
I haven't watched much of ever_x so I can't really comment on his performance other than what I saw on Gubbins' stream, but there's definitely a few casters who should be really good but just don't seem to be putting in the effort. For example I think WARHURYEAH has put out really good analysis in the past but in the last few casts I watched it seems like he hasn't really taken it seriously. I don't know if Bren casted this season but I definitely saw one or two casts in the past where it didn't really seem like he was trying, even though he's probably the best play-by-play caster I can think of from this generation.
There's also an issue of caster bias; Lowpander and Se7en have had it pretty rough on that front. You may not like or agree with their playstyles but if that's the case I'd like to see why you think their playstyle is flawed rather than just making fun and shittalking.
I don't really have any criticism for the NA side of TFTV; in my opinion they're doing a really good job so shoutouts to Marxist, sandblast, cornpop etc; keep up the good work!