It's more so "we don't do it because it wouldn't help much and would require much more moderation". I ask for new boards whenever I see a single, specific type of thread dominating the board (e.g. Bounties(Altcoins) or possibly tokens), not a collection of loose, minor or trend-specific characteristics. If I were to ask for new boards (which I probably will in the near future), I'd have to make sure they wouldn't just sit empty after a trend passes.
I fully disagree with that statement. Whilst the suggestion(s) by OP may or may not be optimal, there is a clear distinction between classic altcoins and ICOs/pre-sales/et. al. and there's a lot o both. That section is suffering greatly due to the flood of both, and a separation would be extremely beneficial.
Fair point. I'll try to work out what new sections would best fit in the long term.