Thank you so much, Sonertial - reducing the delays in this way is helping a lot!
It still is a mile away from the smoothness HLT got me used to - however, this way I can wait for Harry.

Which setting do you run for OBD Extrapolation?

You're writing that you already processed your variable final drive into your resulting gear ratios.
If those are too large for HLT using a final drive ratio of 1.0, you could recalculate your gears for a higher final drive ratio, like 2.0 or 3.0 and include that as well into HLT.

Situation:
When overlaying a video, a notification informs about the relative progress, frames processed as well as heap memory and "speed".
For example: "[...] speed x3,5"

Expectation:
I understand speed as a moving window over the last second, given by the fraction of the current overlay speed ...

As you predicted, the other phone (Nexus 4 with Android 5.1.1) did not perform better.
It's a pity that this combination of top devices for Android does not work out well currently.

Can I help you in any way reworking the interpolation?

From what I read on the forum, setting OBD Extrapolation to aggressive should be what's needed?
Unfortunately, that did not help so much in my case.
Got that old Nexus 4 settled with HLT meanwhile and will give it a try. Your reply took away some hope, however.

Dear Harry,
fellow users,

I am kind of sorry to bother you with another thread like «halp! me OBD iz choppesy» - but maybe you're going to have the one, final idea.

In one line:
Choppy data from OBDLink MX BT AND WiFi with OP3 as soon as XGPS160 gets connected; default parameters and frequent ...

Dear Harry, all,

whenever I export a video using hardware video encoding, the output's colors seem slightly shifted into the yellowish/greenish range, as well as have their contrast ramped up.
raw.JPG Philipp shifted.JPG
This does not occur when using software video encoding - which, however, is ...

Some values truly seem to be unaffected by the expert settings reset.
I came accross the issue and this thread when needing their default values for internal sensors and an OBDLink MX BT myself. ;)

For instance, using a OnePlus Three*, the Display «Refresh rate» gets defaulted back to 5, while ...