Builder BigBuilder (Original) enhanced fan duct replacement

This is the story of a 3000€ printer. https://www.3dhubs.com/3d-printers/big-builder-dual-feed-extruder

It has great framing, great rods, great extruders, great volume, great precision, great mixing solutions, and then...

1 ) An optional, not so great hot bed whitout sensor, allright.
2) Only ONE duct on ONE side of the head for a printer of THAT size? No possible upgrades? Years after release?

Happy that I bought it second hand at less that half the price, else, I would be so pissed