None of these points refute the argument though.
He currently is one of the most productive devs. Wasn't the case with the earlier attempts to write this story.
So maybe the doomsaying was okay last year, but there's been so many updates - this game probably has 10x the content of other games already in a similar time frame. There was a downtime when Greono apparently hired an employee or partner, but it didn't work out and only delayed the game. It seems back on track now.
Doesn't mean that there isn't room to improve further, as he currently looks that good because most other devs have basically stopped working altogether.
Just look at "Deathable". That game got less content in the past 2 years than TwoSides gets in maybe 2 updates.