[LeEco Le 2 Guides, News, & Discussion] twistyplain:
I already tried three ROMs since yesterday. First Liquid remix, then Bliss, and finally AEX. Out of all three, the one that's closest IMO to becoming a daily driver is AOSP Extended. It is very smooth, almost completely lag-free, and the camera is passable. Here are my thoughts on these three ROMs.

The first one I installed is liquid remix. The first thing that rubbed off me the wrong way was the lack of fluidity. This rom does stutter. A LOT!! It's hard to use it five minutes without experiencing a stutter in the UI and sometimes full on freezing. Another thing that I didn't expect is that the stock camera cannot record video. Every time I tried I changed from photo to video mode I got an error that it can't connect to the camera. I installed the v2 of gcam port by nullbytel for le 2 and it couldn't start. Not even once and rebooting didn't help. The last straw came when the phone went to sleep and couldn't turn on after pressing the power button. I had to force restart the phone. The ir worked when I tested it with the flashable leeco remote. The reason I can't keep liquid remix is the failure of the camera. The constant stuttering is also too much and the sleep of death is the final nail on the coffin. I didn't use any custom kernel with it.

Second is Bliss rom. The UI is acceptably smooth and it is somewhere between liquid and AEX. It has numerous customization options which is an added bonus. Cameras work acceptably, both built in and gcam port. The biggest failure of this rom is failure to record or read back fingerprints. When I tried to record my fingerprint, the process of touching the sensor to record the impression caused it to hang permanently. Sometimes it would record a few touches and freeze up the entire settings app forcing me to fc. What's worse is that after these failed attempts, after rebooting, the fingerprint sensor failed to work completely. The inability to add fingerprint security is a deal breaker for me so I removed the os.

Lastly I installed AOSP Extended. Right off the bat this ROM is impressively smooth, it's way better than lineage, pixel experience, and even better than arrow os pie. Everything seems to work well from the get-go. The installed camera, works and takes good photos and videos. Of course shutter times are not as good as EUI but there is a marked improvement in the photo capability of new pie ROMs. AEX is based on lineage and I had an issue with the stock kernel. It had very aggressive touch boost which made the CPU stick to maximum frequency even when it wasn't needed. I noticed unnecessary heating when I was just performing light tasks which made me question its ability to handle heavy workloads. I underclocked big cores to 1.3 GHz and there was still noticeable heating which is inexcusable.

The cameras on AEX worked with stock kernel but failed when I installed overload 4.1 or 4.2. I had to change the kernel to reduce the heating but unfortunately I would have to do without cameras which is not an option. I could also feel that I had to wrestle with it a lot to keep the phone cool and preserve battery. Graphene kernel worked even with the cameras but it didn't solve the unnecessary heating. Fastest charging I saw with AEX was 2440 milliamps which is not close to the 4300 ma I am used to with smalleui.

After a day of experiments I have now removed these three ROMs but if I ever think about going pie again, AOSP Extended will be my first choice.