The bandwidth is not the limit with 24 slots.
I already told some ppl/admins that when the pub server is full the CPU core is at its limit, and that it should keep some reserve for spikes.
However, when its not even at 16 slots the CPU shouldnt be a problem.
Thats also why saying "it lags" is totally useless and needs more information *when* it lags. With the CPU core at its limits, lags would be expected. With just 8 ppl playing not so much.