The Track Matte effect in Premiere Pro almost never works the way we editors need it to, and it's high time this essential effect gets fixed!
When creating a Track Matte, changing the Motion parameters of the clip the effect is applied to also changes the resulting matte. For example, if I zoom my clip to 120%, the clip zooms 120% but so does the matte. This makes it impossible to move a clip within a matte's 'window' without nesting.
The current way to get around this is to nest the clip, apply the Track Matte effect to the nest rather than the clip itself, and then edit the clip's Motion settings/keyframes within the nest. Unfortunately this is a HORRIBLE workflow, since it forces editors to edit their clip's motion settings and keyframes out of context of the master sequence. It also involves the extra steps of nesting.
After Effects handles masking the way it should work: making any changes to a clip doesn't affect the resulting matted effect. This is the way it should also work in Premiere Pro!!!!!!!!!!
A simple way to fix this problem, that would serve the needs of everyone, would be to simply add a "Motion Settings Affect Matte" checkbox to the Track Matte effect, and leave it unchecked by default. This way, the 0.0001% of users who want track mattes to work the way they currently work in Premiere could continue with the current workflow, just by clicking the checkbox, and the 99.9999% of users who want PP's matting to work the way it does in AE could finally have AE's far superior matting workflow inside Premiere!
The AE team gets it. Why can't the PP team understand how track matting should work???
Adobe, Track Matte is one of those effects that pro editors use all of the time! We would really, truly, greatly appreciate it if you could finally make time in your busy schedule to fix this essential tool before resuming attention to other features that are used by far fewer people.