Ugh, just opened one that had no crusader item at all. That's just horribad...

Event chests have 2 guaranteed crusader items, don't see why it shouldn't be the same for vanilla jewelled chests. With more permanent crusaders becoming available it gets ever harder to get something useful while the odds becoming increasingly worse. Even with 2 fixed item drops per chest it is still a 1 in 26 chance to even get something for the proper crusader, further modified by 3 to get the slot you need, and another 3 for rarity. Furthermore I suspect that higher rarities have lower drop chances, too, so might want to multiply by a couple more to get the actual odds for epics. Duplicates become somewhat useless once you exceed 200 EP.

7k chests, eh? Did you save your gems and chests after outfitting the original 20 long ago or did santa come to you early this year?

Event chests have the guaranteed 2 pieces of Crusader loot, because the chests are limited time.

For the base 26 Crusaders, you continue to get Silver Chests and the chance of upgraded Jeweled chests from doing the objectives and free plays, as well as daily quests and missions.