Only from a weathering aspect and people have no problem buying HT's that are insufficiently or overly weathered and then refining the aesthetic to their own preference.
I'd say it depends on InArt's future intentions and how well POs are going for Paul atm.
If they believe Dune and Paul are popular and profitable enough to warrant a full figure from both parts 1 & 2 then there's no need to do anything here; people will just have to suck it up when a part 2 Paul is announced and decide if they want to keep their clean Stillsuit Paul and get a sandy Stillsuit Paul with blue eyes.
If InArt find that Dune merch isn't flying off the shelves and they don't foresee a part 2 figure as a viable option- and, even if they do, they realise they can't announce it until he part 1 Paul is fully released or they'll risk mass cancellations- a basic accessory pack allowing us to add the necessary parts to create a part 2 Paul and weather the figure ourselves would be most beneficial to the community.
The former could mean waiting until late 2025 before a part 2 Paul can even be announced and, by then, we'll be on course for Dune; Messiah and gravitating towards the next version of Paul.