I am not gonna repeat things I just said in the post above, I'm happy enough you got the chance to formulate a proper response (which if anything, shows how much your English has been improving in so little time) but I will leave it personally at that. No point explaining I disagree with some of your points just for the sake it as it won't bring anything valuable to the discussion.
Just for the record, however, when I was talking about a heavy competition, I was more thinking about a one-night tournament with teams (just like this one) rather than something last over weeks/months with regiments, for the exact reasons you mentioned. I remember that when we played to train vs you & the CI during the CL, we had internal battles in the 4e where half of us would go as heavies. On the heavy side these fights proved enjoyable/amusing for the little time we did them and that's why I assume some hussars wouldn't mind making for a change and play competition as heavies versus other heavies from time to time. I at least know I would.
Why does it have to be all on one evening? And how long is it expected to last (how many hours)?
Because groupfighting tournaments have traditionally always been on one evening (thinking about PrideofNi's tournaments for instance). The 5v5 hosted by the 2Lr was an exception in that regards (as far as I know at least) and although perfectly run, it asked a lot more commitment from teams & admins. This is just to give Skittles another way (outside of regimental competitions) to properly seed his Fantasy League and at the same time, have some different fun from what we experienced the last couple of months (CL, SNC).
I will probably try to aim at finishing the tournament before midnight. If we run past that point it was planned to make an agreement with captains beforehand to know if they prefer continuing playing to finish the last matches, or postpone them to Saturday and/or Sunday. But I won't let it slide further than the weekend, as there are other competitions planned the week after and from experience, if you let people responsible of scheduling these matches, they never make it happen.