I still don't see any problems for Materia given the extremely low number of current active player there.

Anyone who just want a house WILL get a house provided they aren't fussy and go for unicorn plots.

I think someone looked up the numbers and even on Ravana which is the most populous Materia server, there are only about 1K free companies, and that's not discounting those which are ineligible for housing at 6.1 due to being new or not rank 6.

Just to put things in perspective, there are going to be 7k new plots per server and from what Yoshi-P alluded in the latest live letter, they will be allocating more plots for FCs so at least half or 3.5k plots will be available for FCs alone.

Simply put, empty wards are going to be more of an issue then players not being able to secure a house.