This reaction from the fandom happens literally every season (I've been watching the show for only 1 year and I know this). People say it's underwhelming and that the "show is going through seasonal rot!!!", then they change their minds once the season actually ends. People just need to stop being so close minded and jumping to conclusions. Watch the whole season before having an overall opinion on the show's current state of quality, god dammit.
I admit season 6's first half has some meh episodes (Applejack's Day Off, The Crystalling, Gift of Maud Pie, etc) but people seem to forget all the good things a season does. No Second Prances, Flutter Brutter, Gauntlet of Fire, and Saddle Row Review were great episodes. No Second Prances was able to bring back a character we haven't seen in ages (Trixie obv), have great interactions with Starlight, have them both learn a good lesson, and develop both of them. Flutter Brutter showed tremendous character growth for Fluttershy, as well as finally showing her family. Gauntlet of Fire was easily one of the best Spike episodes in the series, which is a HUGE milestone. Saddle Row Review was possibly one of the funniest episodes in the show. The episodes have flaws but they were still good nonetheless.
My only big complaint about this season is that there's no real plot thread, but other than that it's been pretty good so far. Not the best and it could be better, but it's pretty good. Keep in mind that we still have 14 episodes left of the season, that's more episodes than we already got at this point. There's still a lot to go.