How many fighting games have a 4v4 mode?
Money and lack of confidence are valid theories. The devs have not stated why they specifically choose P2P with a 4v4 playlist. Games like COD still use P2P cause money and Ubisoft has had lack of confidence in previous games they published. It truly is hilarious seeing a person accuse others of not playing a game while at the same time saying he hasn't played previous Ubisoft games but thinks people just hate Ubisoft without having played their games. Again, it's not just 1v1. It's also 2v2 and 4v4. Why do you keep ignoring that? Ubisoft used Dominion for a lot of the marketing. Want me to link to the launch trailer?
Your R6 comment is telling. Recently? Ranked has had dedicated servers since last year. Yeah, you clearly haven't played any previous Ubisoft games.
You sure are focused on the host advantage issue rather than the real issue of all the disconnects and host migrations. Why do you keep ignoring it and then saying P2P is just fine?