Bayern won the CL, Liverpool the PL last season....Liverpool won the CL before that and City the PL before that...
Look at the teams across different leagues who are performing above expectations: Southampton, RBL (in fairness I think they should be top 4 but have done well in CL), Monchengladbach, Sociedad, AC Milan. Of those the first 4 press like maniacs - in honesty I don't know enough about AC this season but assume they don't press too much with Ibra up top. Other teams are catching up and proving it's not some mystical skill but a very coachable aspect of the game - Potter at Brighton seems to have added a press in a short space of time, most of the German/Austrian group are well known for it, Leeds are doing well for a newly promoted team and their extreme tactics. United have talked about it a lot but we've never really seen any evidence of it.
The point is, pressing is not the only way to play football but I do think having a team that can press well is the only way to win trophies now over a season unless you are absolutely stacked with Galactico level players. It's also worth remembering that Guardiola's Barcelona side was one of the best pressing sides we've ever seen so it's hardly like Tiki-taka and high pressing are mutually exclusive.