You can only really use this year as a guide, but there's no guarantee BA will operate the same next winter. This year it appears the first flight is October 29th, then it's 3 times a week. That happens to be the end of October half-term, and at that point Orlando drops from 14x to 10x per week. So that may be where the capacity is coming from - seems reasonable to think that will be a repeated switch.
You could of course book an open jaw with your 241: LON-DXB/AUH/DOH in Oct and MLE-LON when it operates, to go a bit earlier. Just make sure a oneway DXB/AUH/DOH-MLE is a sensible price.