Played a ton over the weekend. Game is a blast.
Important things I learned;
Right now you cannot get red items to drop from loot crates because they're "rebalancing" them before launch. Red items also won't drop till you're level 25 or higher on the character. With that said the focus now should be on getting your character levels up to 25+ and saving all your level up boxes. Also, if you've made it to champion difficulty you should save at least the Emperor crates till you're level25+ and launch so you have tons of crates for the best loot.
The other important thing is that hero power/character level don't impact what power level items drop from boxes. The power level that drops is based off the highest power level you've already seen. So if the best item you've seen is power level 50, you'll be able to get say up to power level 60 in your next box. It's best to wait till you're at the max power for the difficulty you're playing on to get the best loot out of your emperor boxes.
Recruit = max power 100
Vet = max power 200
Champ = max power 300
So for example to get the best items from Veteran difficulty, you should open your emperor boxes at around 190 "has seen" power level. This doesn't mean you shouldn't open boxes. If you're stuck in a rut and need new gear you don't have much choice. You also need to open as many boxes as you can increase your "has seen" level. The best way to do this is to win matches. I see a lot of groups, even pick up groups, trying way to hard to complete matches with all the tomes and grims, but it's really not necessary. Orange items are nice to get and can really change your playstyle.. but at power level 65 or whatever it's basically salvage fodder because you're going to power through it so quickly.
Until your "has seen" power is in the high 200s, you're going to replacing all your gear very quickly so the overall color quality doesn't matter and that's the real reason to torture yourself with the pickup books. You just want to win and open boxes period. Progressing through your "has seen" power level should be the main focus and even a white quality item with higher power level does that.
So for the next 3 days of preorder beta this is what you should do.
Win as many matches you can on the highest difficulty you can.
Open only the win rewards and save the level up rewards. Optional to save the emperor chests till you're at the high end of the "has seen" for that difficulty tier. Saving boxes will slow your has seen progression, especially if you're also saving level up boxes, but it'll be worth it when you have 30+ boxes to open when you're at the end of your "has seen" power and you pull reds for every character.
Ignore the pickup books unless you have a very strong group, especially the grims. The tomes are much more manageable, but again Winning > loot. Win crates are fodder for your "has seen" power level.
Reach level 25 on your preferred character(s) and progress as high as you can with your "has seen" power level. Important to note that "has seen" isn't character specific and it carries to all 5 characters so you can level multiple very quickly.
@Quipling @GhostZ06 @Gref @RoryFan