glassbecause they have no idea what they are doing, they will pick a random pyro weapon and buff it into absurdity, ruining casual tf2 for a few weeks/months/years while they consider how to fix it. last time it was the phlog. remember that?
If u think any iteration of the phlog is/was op u may be retarded. Unfun and stupid is the most extreme answer I will accept but that's what most unlocks post-Polycount update are.