BK100
With reference to A320s being used in place of A319s, isn't it the case that the currently based A320 is fully utilised on routes other than TFS? For example it's operating the IBZ later today and tomorrow will operate PMI, AMS and ALC services. I believe its extra capacity is sold on all routes it's scheduled to operate so I would have thought use of A320s in the longterm might be possible - and profitable.
From what you say regarding 24's climb path obstacles (the critical ones anyway) I assume that are just trees. Looking at the Type A chart that does seem to be the case, apart from obstacle No. 16 which looks to be the church spire on Bridgewater Drive(?). Certainly it will be good news if the current weight restrictions on that runway can be eliminated.