I think with Sonic, their sculpts were actually pretty good. Much better in likeness than anything that came before them. Their downfall was with engineering and qc. I still have their Metal Sonic. Best thing they ever made, if only because Metal Sonic's design was kinder to their engineering design. If only they made then a touch bigger, they could have made at least decent 1/12 toys.
Overall, I think if Jazwares brings their best qualities from their work on other licenses, it could be a net positive. They had AMAZING character selection in their Sonic line. More than any line before and after it thus far. We got almost everybody from the mainline and side games, with only notable misses being Omega, Cream, and Rouge. Sonic and Fortnite have also been pretty good with accessories. Fortnite afterward also picked up in engineering, though if only because the designs are easier to work with.
I think the worse move they can make right now is not following the path Tomy and WCT were treading in making serviceable 1/12-ish scaled Pokemon. They can improve on that march, but it's up to them