Just returned to GW2 and tempted to buy the expansions, have some questions though.

Hey guys!

Just returned to GW2 after 4 years(!!!) and I'm enjoying myself a lot. My max level char. is level 63 and as stated I'm tempted to buy the expansions, which comes with two level 80 boosts. My question to you guys is if I decide to spend the 80 boost on an alt, then what's the point of completing hearts and exploring? Experience is a waste at max level right? And at level 80 the chests that you get from 100% exploration seem kind of weak, right?

Please help me out with those questions guys, I'm curious.

Cheers!