I know that the subject of polymer panels being OP (or not) was beaten to death on the IRC.
One of the issues many have with it was that it's weight vs cost, although with the addition of the markets, a lot of the lower end demographics seemed to prefer steel cars. Probably due to the better safety, lower costs and otherwise still decent stats when it came to boring cars.
IMHO I think the best solution is to wait to see how well the current situation ends up working in the end, when the tycoon starts being implemented. And I personally think that adding more depth to the materials that we have is the best approach.
One thing for sure is that polymer was seriously overused compared to it's usage in real life.
Edit:
Trifler wrote:Was the old Polymer overpowered? Probably, but the current options don't really allow for Saturn-like cars. They emphasize high-end cars. Just using steel for almost everything is rather boring. Maybe if Fiberglass shifted its emphasis on Production Units over to tooling instead, then it would be better. At least then it would be a fixed cost.
AFAIK this is the plan, and not just for Fiberglass but for many of the other materials.
You would have more artisanal ways of doing things, which require less expensive tooling but more PUs, and more automated ways of doing things like SMC in the case of fiberglass.
It's just that these options haven't really been implemented yet.