No option for resampling the script to video resolution

[eXmendiC]

I've issues with resampling the script for Crunchyroll subs.
There are only two options at the moment:

--resample
I resample the stylings to the script resolution which ends in vsfilter/xysubfilter showing small borders:
MPC-HC (xysubfilter): https://cdn.discordapp.com/attachments/246368272327507979/401702310075695104/example1_mpc.png
mpv/VLC (libass): https://cdn.discordapp.com/attachments/246368272327507979/401702311254032384/example1_mpv.png

--resolution 1920x1080
I force the resolution to 1920x1080 (because my source video is 1920x1080) which ends in having wrong positions for typeset: https://cdn.discordapp.com/attachments/246368272327507979/401713873595531264/not_fixed.png

I'm missing the following option (which does exist in Aegisub, but not prass):
https://cdn.discordapp.com/attachments/246368272327507979/401714432419299329/aegisub.png
Instead of resampling the styles to the script resolution (like prass), it resamples the script to the source resolution (and then I override the styles).
With that option it looks like this: https://cdn.discordapp.com/attachments/246368272327507979/401713868717686784/fixed.png