I like the ability/damage style the pets have in AL, honestly it is one of the few features AL has that PL doesnt that i actually enjoy. I feel that it would be an amazing feature to see pets like Tinsel shoot fireballs at your enemies, or have Angus head-but people, or even have Gingerbread Boy break off his arm and beat a skeleton with it...okay maybe not that.
But it would be an amazing feature to see brought to PL.

As for enchanting, im personally not really a fan of enchanting anyways but it would actually be interesting to see an enchanting system done for pets, or as Buchmeister said more set completing pets.