Crazy game

We all shall remember the sacrifice, thank you for your servide, he may now rest amongst God PLT_Godde

I still don't get why the nuke was launched right when it does. Nukes fire instantly and thermite takes several seconds to kill the launcher, this was eminently avoidable!

I'd say some factors favor Funnelweb:
Attrition. You are likely to lose some shields and especially cons while reclaiming. It is easier to keep a screen infront a funnelweb as the shield is bigger.
Long build radius. It helps to funnelweb to stay alive while repairing and reclaiming and building.
Big shield radius. Easier to shield front line units without exposing the shields themselves to attrition from cloaked snitches, Likhos, tac nukes and other stuff. It also makes it harder to stun with Shockley as the Funnelweb doesn't have to stay so close to the frontline and the shield can block a Shockley missile.