Sleeve draw is nearly fine, as it is currently. The only thing that needs changing is moving its cooldown to 2 minutes to synch it up with Divination. If the devs wanted to be REALLY nice, they'd give it two charges. This would alleviate the loss in Rdps, while guaranteeing a perfect divination every time, regardless of pull, timers, countdowns, and so forth... for the opener.

You'd draw a card normally, then you'd get your two remaining seals from the two charges of sleeve draw. You don't HAVE to make that change to it, but it'd mitigate the loss of cards overall throughout the fight and balance it between what we have right now, and what we had pre 5.3

Alternatively, you could keep it as is, and reduce the CD to 60s if you really wanted to, to match the amount of cards you'd get from it (60s, 1 card, vs the old 3 mins for 3 cards).

Any of these options would be fine, but let me stress that it's not necessary, except for moving the CD to 2 min to synch it with divination. Everything else is purely optional.