That is quite a cut on the NQY services given that at its peak the E195 can be full. I wonder if there is scope to add a 4th daily LGW service to balance the drop in seats?
Maybe something like this although granted that last sector may not be appealing at those times - a bit of tweaking to schedule maybe:
0735 - 0845 / 0930 - 1040
1125 - 1235 / 1320 - 1430
1600 - 1710 / 1755 - 1905
1950 - 2100 / 2145 - 2255