I got 3 wins in ranked with crypto yesterday (didn't play much) and finally got to plat. He's GOOD, like REALLY good.
Not a single time a team hit by EMP survived and I didn't even hit good ones... But the main attraction is still the drone. Knowing everything is such a HUGE advantage.
P.S. That's playing with randoms. He would be even better with a team that's used to playing with him.
As for banner recovery, 1 of the 3 wins were obtained strictly because I got both banners with the drone (while the enemies were actually looting the boxes XD). It IS extremely useful.
And I completely disagree that his abilities become less useful in lategame, I'd say the exact opposite. Gather the intel when you have good spot (e.g., secured a house), note where EVERYONE is (the important part of using crypto for this is that you find ppl who are not moving or shooting - those are VERY hard to find without the drone) - that's crucial to an easy win (e.g., in 1 of the games, knowing exactly where 2 solos and a full squad is allowed us to 3rd party the full squad when they engaged with a solo, essentially securing an easy win).
And then use EMP on the final fight to put the win in the bag. So far I tried to not EMP myself (I don't mind hitting teammates - they get only mild effects), but I think the best play in endgame is actually put a quick drone and EMP everyone, including self (drop and pick up the armor for bonus points).
P.S. Learn the charge time of the EMP and make sure it goes off as soon as you get into position, not giving enemies any chance to shoot the drone.