[Should GW2 come out for PS5 or XBox]

Also I forgot to mention that I still don't use a mouse in FFXI on PC. Although it's not exactly a tab target game. It'ss still an MMO all the same. :)

[Should GW2 come out for PS5 or XBox]

You do realize that most consoles these days support a keyboard right ? That means 40 buttons will be no problem on consoles, especially with a keyboard. Also there are keyboards going for $10.00-$20.00 unless you like playing with the more expensive keyboards on PC/console. PS4 and PS3 allowed it for FFXIV. Heck even PS2 allowed for keyboard as well Via FFXI and a couple other things. Mouse isn't totally needed. You could use the controller to move around and the keyboard for everything else like I did on FFXI (with the PS2) before I migrated to PC.