I had store problems w/ OREO too. I was able to fix it by getting and apk of the latest store app an installing it play store
It seems to be a general issue with the plus. It doesn't looks like battery life is outright bad, but not maybe what you would expect for a near 4000mAH power pack.
GSM Arena's battery test has the u11+ sitting on the same score as the U11. It looks like the u11 plus' LCD just sucks way too much power.
Compare it to something similar, like the Mate 10 (~6inch LCD, ~4000mAH battery, different SoC but the I believe the 835 is supposed to be fairly efficient) and it seems to do considerably worse.
This is the one I got, but my speigen case conflicted with it so I needed to cut the corners. HTC U11 Screen Protector, IQ Shield Matte Full Coverage Anti-Glare Screen Protector for HTC U11 (HTC U 11) Bubble-Free Film https://www.amazon.com/dp/B072F2FSY5/ref=cm_sw_r_cp_apap_hQTvnrOB5pLNu
Just in case anybody is watching, I think the Spigen Crystal case was pressing the sides and constantly activating edge sense, even though I had it set to highest pressure.
I've swapped out to the HTC case that came with the phone and am no longer seeing the EdgeSensorService in the battery usage stats.
I'm in the same boat. i was looking at the spigen, but I wanted something with more protection. I'm waiting on this to come in shortly... https://www.amazon.com/Seidio-Dilex-Case-Kickstand-Black/dp/B0742DXDTM?th=1. Its a bit expensive, but I was looking for Defender-ish.
I have this case. It does alright. My screen has quite a few micro scratches though, since I had to remove my screen protector 3 weeks ago. Other than that, for $10. The case is pretty solid. https://www.amazon.com/dp/B073DFNG4T/ref=pe_825000_114665720_TE_item_image/142-1340119-7274156
Available in Black, Green, Blue, Red, Pink
https://www.amazon.com/dp/B073DFNG4T/ref=pe_825000_114665720_TE_item_image/142-1340119-7274156
This is the screen protector I chose. Lifetime warranty as well.
https://www.amazon.com/gp/aw/d/B072MSBFDK/ref=ya_aw_od_pi?ie=UTF8&psc=1
Brand New replacement. Fully protected out the box!
Didn't open any yet. As I'm still waiting on my 2 free Amazon Echo Dot Release code, for the original.
I'm happy as shit right now! ��
Edit: put screen protector on NEW phone (not activated yet) and it's just how the product description says it is. (just like a ZAGG INVISIBLE SHIELD) can't even tell it's there.
The case IS squeezable. Just so you all know. Kickstands on both case and holster. Not flimsy either. All in all. Great products for the $17 I paid for BOTH. Standard shipping. Came in just 4 days from ordering.
If you're interested in covers (doubtfully so, but who knows, ill just share whatever information I got) I ordered this one
https://www.amazon.com/gp/product/B071WBZ8FZ/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1
I don't like sense, I'm using Nova Launcher ( https://play.google.com/store/apps/details?id=com.teslacoilsw.launcher )
For ROM I'm using Viper, it's clean and fully customizable.
At least now I see why you mentioned smoothness... Sense is the problem, remove Sense and the phone will feel like lightning fast. Install Nova or any favourite launcher and disable Sense, if you decide to keep the stock ROM.