Sorry for delay in reply...
If you are using ET in mostly Gorge swell then i'd say go the new Evo, the ET may be a less grippy in these sort of conditions where directional stability and keeping the board in the water is more important!
Obviously the ET80 will be less controllable tha ET74 in stronger winds but its still fine for 90kgs (my weight)
It sounds to be that you are gagging on getting a new toy!!!
I'd say get an ET80, remotivates you and lets you try something new, the ET80 feels just like an Evo really just you can really tighten up your turn and get more vert and bust the fins out easier!
Jumping is fine just like the Evos!
The decision is yours!!!
Hope i've helped