Yeah, I really regret buying BF1. Eventhough i played the Beta for about 10 hours, I only played the actual game 7 hours after it was released. That's how much it sucked.
Because of that and the SW:BF microtransaction desaster I didn't intend to get BF V and since I'm still having so much fun with R6S I also don't really have the need to play another game.
Still, after seeing all that footage and hearing all the information about BF V I might give Battlefield another try if the beta is any good.

PS:
In case you are looking for another game after playing BF4 for so long, I can highly recommend R6S. Eventhough it's a totally different kind of game than Battlefield it's also somehow similar in terms of gunplay, skill/teamplay and the use of gadgets.
The fact that BF V copied a lot of game mechanics from R6S says a lot about how good the game is.
It has a very steep learning curve though and it can be very frustrating to play in the beginning, but it also has basically not skill-ceiling which makes it fun for a long long time.