If you focus on mobile and web games, then yes, you should move to C3.
Slowly, but sure, it will surpass C2 (already does in some parts).
You can still use C2, but things are more simplified with C3.
For me, the subscription wall keeps me to C2. The price is decent (around 8€/month) for what C3 offers, but there are months when I don't open C2.