The timer no longer works (for everyone?) and there is 2 optional routes now

How will speedrunning work now?

The Scenario has been reworked. All new/reworked Scenarios do not have a working In-Game-Timer, so you will have to use an external one (livesplit for example).

For the Scenario Port Escape i suggest that you find the fastest route and try to speedrun that. Splitting it up would be unnecessary because there only is one "goal" and the routes are not drastically different from one another.

So just try to do it as fast as possible, timing it with an external timer.

I can recommend joining the discord because questions just like yours will get answered there in no time :)