BE are currently selling IOM-BRS 3 x weekly right through the winter, so information on 'the other thread' may be questionable. The aircraft also does BRS-JER so suspect the objective is to provide an aircraft for that busier rotation and to keep Manx2 on their toes at GLO.
LPL and MAN frequencies are retained at daily x 4 and daily x 5, except for certain slack dates in January, as is usual.
EZY will only come in 4 x weekly, with no Saturday flights, which doesn't represent a very flexible or attractive option for most travellers, so they will continue to be an irritation to BE rather than a serious competitor.