Let me explain how this works. You have an opinion, I have mine. I'm not sure who made you the arbiter/authority of right vs. wrong opinions on the internet. Maybe you were awarded the judge of all sports-takes and I just missed that? Congratulations on the new role. I am not sure how one good game "proves" a player has made it and any and all doubts should be cast aside. Remember Jonas Gray?
I respect that you think he is an explosive playmaker in this league or whatever that opinion might be. MY opinion is that I love his heart and grit - but STILL don't see him as a big difference maker or explosive offensive weapon in this league long-term. I realize I am in the minority, however, it isn't a knock against the kid at all - he is perfectly fine to field kicks but don't see him as the answer to our dreadful skill-position conundrum. He was taken OFF KR duties for a reason and can't earn snaps at WR except in garbage-time. This is in a WR room that has dealt with injuries (Harry/Edelman) and is arguably the worst WR room in the league.
Point being, I am curbing my enthusiasm a bit, and you (and many others) are "all in" on Gunner. He had a couple of long returns but it doesn't seismically shift my opinion of him since they were against an absolutely pathetic/historically bad ST unit (Chargers). If he can play on 3-4 special teams units and field punts that makes him a "core special teamer" which is about what I have as a ceiling for him...
BUT, if he becomes Julian Edelman in the slot and becomes a reliable #1/#2 receiver or even starting slot receiver similar to Welker/Edelman - please feel free to call me out and I will admit I was wrong then.