Dredgeworks is crashing when it tries to set up a belt or inserter from [other mod].

Activate "Limit floating belt generation" or "Limit floating inserter generation" respectively. If this doesn't do the trick, something new has gone wrong and you should file an issue report; if a particular belt or inserter is one you'd really like as a floating one and it's not currently compatible, or it was previously compatible before an update to Dredgeworks or the other mod, leave a request in discussions.

Bob logistics currently has misconfigured item icon sizes for some of its belts as of 2.0.0; you will need to activate "Limit floating belt generation" for compatibility until the icons are fixed to use standard sizes on that end.

Are you going to add more tiers of drill?

Not currently planned.

Why is ice generating underneath my crude oil patches?

Space Age. It assumes oil patches on bodies of water are going to have ice under them due to one of the new planets, so it applies that rule to Nauvis as well. It's a little odd, but harmless. These patches shouldn't generate if you also have Cargo Ships installed, though.

I don't want Dredgeworks to submerge a particular ore - is there a way to stop this?

To exclude an ore from automatic submerged version generation:

• Include Dredgeworks as an optional dependency to ensure correct sequencing.

• In the data phase, set do_not_submerge["ore-name"] = true, where "ore-name" is the name string for the ore you do not want submerged.

This will prevent the submerged ore entity from being generated, and in turn, prevent it appearing underwater (Dredgeworks first deletes ore colliding with water, and then creates submerged ore in its place when suitable). It may still show up as generating on water in the map preview.