tmobile flex 2 questions

There's just so many threads with so many different providers around the world, i am really confused on a to-do list
Here's what I've gathered so far

In order to make the phone function properly, i.e. 5.1.1, it needs to be updated. Two ways:
1. install 5.1.1 PR
2. OTA via ATT via go phone sim ( sim + data fee)
there are no other viable solutions

Then once updated,
1. if on 5.1.1 PR, http://forum.xda-developers.com/g-fl...1-1pr-t3206091 needs to be performed in order for it to be functional
2. if on ATT, then http://forum.xda-developers.com/g-fl...lte-h-t3119001. after that, bloatware needs to be removed via rooting

am i missing anything? I am coming from a nexus 5, where everything was good out of the box....at least IMO

LG G Flex 2 issues?

Hey Guys! I'm thinking of buying the LG G Flex2 H950 from qualitycellz on ebay, just had a few questions.
1. does the phones still overheat for anyone on the 5.1.1. update?
2. is there a list of apps that are safe to remove once rooted?
3. is the s810 the rev 1 or the 2.1 found in the later models of the m9, oneplus 2, z5?
4. can you disable cores and just run it as a g4 basically?
5. I hear battery life is spotty, how much sot are you guys getting with boat disabled? and does disabling the cores help?
6. I have heard a lot of people have had flickering screen and rebooting on devices bought on ebay from the above seller, has anyone purchased any recently? do you have this issue?


Thanks

Your experience with G Flex 2

Hi! I'm interested in G Flex 2 because of Snapdragon 810 chipset and great screen. How is your experience so far? I would be greatful if you answer me few questions:

1) I really hate lag - even a slight lag can destroy my experience. I had to sell my LG G2 because of the lag. G Flex 2 was pretty laggy phone with 5.0. Did LG improve performance with 5.1.1 update?
2) How is the screen? Any issues?
3) Is overheating real? (I dont care about hot back cover, but I dont want to have my experience ruined because of extremely laggy throttling phone
4) How good is battery life? I don't need 2 days, just 3-4 hours of on screen time. Is that possible without issues?
5) Any other known issues with the phone?

Thank you very much! :)