well.
I have 180timelines at 2min each to conform and so anything manual sadly wont do 
its like THIS close to just be a one click conform if the action wasnt bugging out …
from what I hear tlfx actions are a bit of a minefield.
so far… from what I have tried
aaf from premiere has no repos
aaf from resolve has no repos
fcpx-xml from resolve has repos comming in as as 2D transform (which obviously does not work).
xml from premiere has repos as action tlfx and after this fixing script they are accurate (given the scale factor of the proxy vs rushes and how the premiere setup was done.
whats gotten very common here is premiere users working with fullres proxy media so prores proxy but in source 6K or whatever res on a HD timeline, you then have 2 options
if you just drop a 6K clip into your timeline premiere with just “center” crop as default resize
“set to frame size” scales the clip down to fit into timeline res (letterbox scale) by putting in numbers in a scale effect. so each clip will have a scale applied to it, this only makes any sense if proxy res == rushes res otherwise those numbers dont make sense at all.
“scale to framesize” on the other hand is doing a letterbox scale without touching the scale effect.
This us a crucial and often overlooked thing that in premiere it really matters how stuff is set up for scales to even have the chance of working.
So now lets say someone has choosen option 1 “set to framesize” and a clip has a scale of 32%, this is now relative to the clips resolution because its the same operation as a resize in flame set to crop but then scaled 32% which you cant do in the resize node m because “crop” has no additional scale options and everything larger than timeline res gets cut off. So thats why we have to use action.
In Action the idea is that just by throwing in a 6K file into a tlfx action it should behave exactly like a “center crop” operation, which it does! usually… without this bug at least. So when you then apply a axis node on the surface a d set it to 32% scale it will match whatever was done in premiere - cool.
Option B ( scale to frame size ) gives you scales relative to timeline resolution, so you could totally do it all in a resize node by using letterbox and then put in the additional scale values used (the will most likely be positive or above 100%) .
Also when using this the resolution of the proxys are a none issue, ideally its the same aspect ratio as the source however.
I prefer optionB, much cleaner imho. but somehow everyone does set to framesize and its always problematic