Yeah so here's what I discovered after recording 3 videos in RAW for my channel. This are more like workflow but also some small bugs that would be nice if fixed.
Exporting RAW to ProRes
It seems that when converting from RAW to ProRes makes no difference either from SD card to SSD or copying files and converting after, so don't know if this is good for SD card's life but it saves me from copying the files over the computer and just convert to ProRes. Export time seems to be the same. This might not be the best idea though and probably would be best to copy to SSD before.
Using a External Monitor (1080p feed)
Pink dropped frames are inconsistent and can't be controlled, it seems that sometimes I get NO DROP FRAMES using 14bit, but I get dropped frames using 10bit WITH external monitor.
What I do at the moment to work around this is just set the framing and exposure and turn it off while using the Canon IR Remote to do the cuts in camera. This wouldn't work in a Run & Gun scenario though so probably would be better off using a magnetic EVF.
I did get some clean 45 seconds takes using MCM Rewire 14bit 16:9 with Kill Global Draw ON, but sometimes I can't get more than 5 sec without pink dropped frames, so still better option to be safe just turn it of. In case of headshot / interview type videos, it might be ok because you could just put broll on top and fix it in post. But I hate that!
Working with MLV App
MLVApp works better for scanning the RAW video BEFORE applying corrections / processing so I can scan a video and see if it's good, if not delete it and AFTER process it for export.
I love the results coming out of this app, basically just using the Rec709 conversion and white balance picker & some sharpen. After that I pull the video in FCPX and grade it there, as FCPX is much more responsive with MOV.
Sometimes MLV App just froze when exporting clips, so better to just export 5 clips at a time if longer and quit the app and come back. Yeah, not the best experience but it is what it is.
Recording videos for YouTube
Recording videos for long format (1-3 minutes) in 14bit / 10bit is better split between cuts - using the basic Canon IR Remote works like a wonder, it also makes your job easier in editing. Even though I would prefer to have 1 long 10 minutes video and chop it up, converting a 10min RAW video in MLVApp takes like 6 hours, which is totally not doable.
I did get a 1:35 min clip using 10bit, monitor OFF without any dropframes, looking great. Exporting RAW to ProRes for this takes 45 minutes though. That would not be a problem, however sometimes after this long export times MLVApp just stops responding and you basically loose the export too. So that's why I think it's better to do the cuts in camera if possible, or at least as close as you can & keep everything short.