It can go both ways, as seen in the past
The "Suzy" curse
Suzy debuted in Dream High(2011) , following her group's massive debut year. Miss A in 2010 won Daesang and achieved #1 on Gaon Digital, I believe they are still the only group to win a Daesang with their debut song(?)
Anyways Dream High blew up and she received offers left and right. She worked as an idol and actress and that boosted her popularity to be the #1 IT Girl , affecting the group as she outshined others and JYP never really pushed the other 3 as individuals. IIRC JYP tried to push Jia in China yet she struggled to build a solid fanbase
Yoona & Taeyeon , The Lucky Charm
In 2008, Yoona was the lead for You Are My Destiny, she had done two cameos before around the time SNSD debuted. With 41.5% viewers rating, she achieved two 'Best New Actress' Awards, being the first idol-actress to win such awards. Taeyeon, on the other and recorded 2 OSTs with 'If' making a buzz in Korea. She managed to chart high on charts before her group with 'If' and gained multiple variety show offers. In January 2009, with Taeyeon & Yoona being widely known by the public, SNSD released Gee and the rest is history.
I believe if Starship want to push Wonyoung as an actress, it would be a Suzy-like route. Tbh they should let others in the group(Gaeul or Leeseo for example) to start acting as cameos and WY to gain as many solo CFs as she could get. Her being an actress on IVE's rookie year seems risky even with the presence of Yujin. Yujin should do more variety, she's fun to watch
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