For main league folks, what are your plans for massive blank in GW29? I'm stuck between using my WC or fold my hands, do nothing and get a beat-down to sub 20s like Igebotz.

Both old and New teams are accepted - players are expensive and starting with a new team might not get you what you currently have except for the chips. You can create a new team, get your £100m and all chips.
You have a good team unlike some of us. ....
I left the league, I will rejoin join the new league with a new team now that I have seen the importance of these chips. Even though players are super expensive now, it's just 2-3m at most and can get some inexpensive players to cover it but you see those chips, they might be the deal breakers.