I can agree with that. Staying inactive should be limited up to 1 min then auto spec.
Many times i have seen at least 3 inactive players in one team what makes them unbalanced a lot.
Lack of space on our main server is slowly becoming a problem (not long ago we could only dream about it...), but remembering what happened to our ETpub, where some players left for the Beginners server, I have some fears about running the second ETL. Instead of one server full of people, we can have two almost empty.
However TM is becoming more and more popular theese days and maybe, just maybe we will have to think about running a second ETL server in the near future?