The tiki-taka strategy that Xavi always developed when he was at Barcelona is indeed very useful for breaking down defenses because it applies excellent teamwork and utilizes speed and accuracy to advance against until finally to the goal point will be executed to score goals. So far with that strategy they have always managed to break down the opponent's defense.
Xavi is one of the players who have a crucial role in the success of Barcelona tiki-taka in Pep era. As far as I understand, there were 3 players who have the most roles at that time, they are Xavi, Iniesta, and Messi. S, if Xavi applied tiki-taka for the current Barcelona squad, it surely will be applied very well. Xavi knows very well about tiki-taka, and he experienced a lot as a player who used tiki-taka tactic.