Everything rank X.. now what?

Do we really know that Premium packs give a higher chance of UR drops per rare slot than Expert packs, or is this like in ME3MP, where all rare slots had the same UR drop rate, and Premiums only got a higher UR chance because there are two rare slots instead of one? If you're spending real dollarydoos, then the Premiums give a better return value on Rares/URs than Experts, but if you're spending credits, it makes a lot more sense to me to buy two Experts instead of one Premium, at least, until someone can prove one way or the other what the specific UR drop rates are per rare slot per pack.

Damn you people and your excessive free time for video games

No, not the ultra rares! Everything else.

My plan was to start saving up the Credits now, instead of buying packs.

And since I hence no longer 'need' credits, I can
-stop speed-running Zero/Outlaw non-stop.
-experimenting with 'fun' builds.
-look into completing some of the challenges.
-trying 'fun' guns.
-even play the single player a tiny bit?? (30 min played so far)

What are you guys doing, or planning to do at this stage?
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Just use the Sweeper, the devs say it's really good... after testing the multiplayer on bronze