So when the patch just came out, you could skip receiving the cache from Tyrael and ensure all five caches were with bonus cache included. When you were done, you could invite people. Did they fix this? :S

Yes, you can still do this. You just complete all the bounties in all five acts like normal, and you'll have 5 quests to talk to Tyrael in the respective towns.
Talk to him in the order of the Bonus Acts and everyone will have their caches and bonus caches, no problem, assuming nobody talks to him prematurely.

Awesome. Thx.