The thing is, almost any festival has massive queues for everything. This (tramlines) started out as something pretty small, got about 4 times bigger this year and I'm sure there will be some lessons learned.
Not blindly defending the organisers, just not being knee-jerk reactionist blindly attacking either. A little perspective is perhaps needed.
That said, yeah, if there's another couple of years like this I'll happily be slating them with the rest of you. There does seem to be a good bit of folks being smug they didn't bother getting tickets/pass jumping on any complaints to validate their choice. If you want to specifically see a particular act, make an effort to do so the rest of the year. Festivals are generally about the thing as a whole, not just about seeing specific acts.
Constructive criticism: They need a bigger entry area (at least for peak times/start of day) and a couple more bar areas. Going cashless might be an option too for getting the bar sorted quickly (you have a token you charge with cash before, flash the token to pay, so the bar becomes "I'll have 4 X please" which are probably pre-pulled a few seconds before. You then just flash the token and walk away, it's a... 20 second transaction).