In April, I visited the garden center I purchased it from; they actually still had a similar fig that they overwintered in their greenhouse. In a normal winter, they wouldn't have expected their fig to survive; but this was no normal winter. To their surprise, it too had started to sprout (not as much as my over-achiever, however). They instructed me to cut off these huge shoots (the horror!) and not bring it back out until mid-end April at the earliest (and be prepared to cover it on any frosty nights).
So I took the plunge and hacked off those tender shoots. it suffered no ill effects, and bought me some more time into April. Plus, I could now get it through the doorway.
So here we are in mid-May; the fig is on the deck and appears to be happy as a clam. The new shoots are a much darker, healthier green; obviously those neon shoots while in the basement were not going to make it anyway. Moral of the story - I think I'm getting braver at this tough love for plants; sometimes (to quote Nick Lowe) it's better to be "cruel to be kind" even in the plant world. But maybe I need to lay off the pruners for awhile; I broke my Felcos today pruning some junipers . . .oh well.