Do you think it would be better to put the glass cloth on the bottom side instead of the top?
It seems to me that foam and cloth also have entirely different characteristics.
On my plywood boards I put 6oz/yd glass on top and bottom. I use 3 layers 3mm birch plywood for the core. It is still pretty flexible like this and it is possible to break them, though not very easy.
For a solid wood core for sure it is better to put the glass on the bottom if you only do one side, because these composite fabrics are all strongest in tension and weaker in compression. When you flex the board the top is in compession and the bottom is in tension.
The boards that I have broken failed in the bottom glass and bottom layer of plywood while the deck glass and plys remained intact and seemed to show no signs of excessive stress.
I would not coat the wood with epoxy and allow it to cure before applying the glass. If you do this you need to wash off any amine blush if you are using an amine hardner like West System and many other brands. You also will want to sand it smooth which can be a PITA with straight resin.
It is a good idea to coat the wood with epoxy 10-20 min. before laying on the cloth, then using more epoxy to wet out the cloth. This way when the wood soaks up a little bit of the epoxy you won't end up with any dry spots in the laminate.