The 4 original Dynamis worlds are well populated, Seraph even toggles to 'congested' most evenings and has for some time now.

A quick glance this afternoon showed 40-60 Mansions unbid in Mist alone on the 4 new Dynamis worlds after the 1st lottery cycle. I got a good medium(30) there and the only other occupied plot was 5 (naturally).

The housing capacity is there for those who want it.