I acutely don't recommend allowing robotports as an upgrade.
If the goal is to prevent bot bases and logistic sorting then requester/buffer/active provider chests can be banned instead of roboports.
Having to come back to the planet if anything goes wrong is frankly not tenable in Space Age because travel is expensive (time is a cost too) and a huge interruption to what you were doing since you don't just need to travel to Arig but back to where you were if the other planet isn't fully up and running yet. Wube went through a lot of trouble to make sure remote view was extremely smooth to use and the player could work even without the engineer's presence. You can't even use spidertrons in place of the player on Arig because they can't be reasonably supplied on Arig without manual intervention.
This gets to be an even worse if you have several planet mods or push planets further apart. Frankly if I HAVE to come back to Arig if literally anything goes wrong (because something will go wrong, the player is only human and WILL make mistakes in their design.) then I would honestly cut Arig from my future playthroughs, and I don't want to do that because Arig is cool.
Banning roboports when remote view is such a critical part of the game is not an acceptable solution to me. If even rocket silo requests are too much then see if it's possible to make a custom silo without requests (Like Lignumis's emergency escape rocket, which needs to be manually loaded.)
TLDR: Unban roboports, ban requester type chests.
Also Re: Vulcanus, non-oil resources use so little calcite for lava processing that with large drills and mining prod it is effectively infinite. My starter patch of 554k calcite has a functional value of 4.4 million and my 40 foundries consume 10/s which means I have unlimited iron and copper products for 5 full days (assuming I play for 24 hours) of playtime. If I grab one of the many 10+million patches it will last for 2400 hours (or 100 days) of continuous running.
Resources on vulcanus are infinite. Having another planet with infinite resources has 0 impact on balance unless you are doing the bare-minimum on each planet and leaving it to run for months without any intervention.
(I don't have a problem with needing to unlock Roboports on Arig, so long as I can drop personal bots beforehand since that should now be fixed.)