Tangentially related, this is why I wish Behsten & Slahtz were added to the game. There’s literally zero low-level BGs. Runes, BFD, Battle of Ashenvale, Incursions – the low-level content is there, but nobody is doing it after P2.
In addition, I think leaving the minimum level requirement for 300 tradeskills at Level 41 (after P3) is another reason there’s less low-level activity. I shouldn’t have bothered to level (2) Hunter alts to 39 because nobody does L39 brackets and I can’t get four professions past 225.
Even if Behsten & Slahtz were added, I dont expect that would really increase the number of alts now in Phase 4, but I still wish they were added so I had a reason to Level a Druid and Warlock alt.