Good lord no, stay away from GT3, if you think BoP is a problem in GTE, it would be 10 times worse with GT3 cars! There aren't a defined set of rules for GT3, just build a car then BoP it.
And GT3 is no longer that much cheaper, hence the growth in GT4
I think there does need to be a superior GT class for WEC, and GTE does that well. Could do with a few more AM entries though.
Hopefully Ginetta will get their customer P1 car sorted for next year, P2 will settle down, with those teams holding off till they see performance levels buying cars later this year.
I reckon WEC is just have a pause after a few years of growth and will spring on again next year.