I don't mind joining games in progress. It doesn't effect stats. However I think two things should be added.
1. My feats when I join a game in progress should be given to me based on the average renown of all players.
2. I'd like to spawn in with a speed boost during my first spawn to compensate for the bot suddenly disappearing on my new team.
Ive been thinking about this for a while...
If it doesnt affect stats, does it affect matchmakingrating? Does it affect matchmakingrating only when winning? Because if it does this would lead to a constant global inflation of MMR over time based on how much the individual plays (because playing more = more matches where MMR can only be gained not lost - in that scenario)
Furthermore if mmr stays the same on loss then you can lose a bunch of games in a row that already started without being guaranteed some ez winnable games afterwards to make up for it.