And as an update to this.
Using Construct2 135, one of my projects already created and on the store in win8 form, and visual studio 2013 i had the following results.
1) doing nothing just opening it in 2013 it ran fine and identical to on win8/ie10
2) upgrading the project to win8.1 in VS2013 (right click project and upgrade) allowed the project to run in ie11/win8.1 mode. This gave me full webgl/advanced audio support like on chrome. Resizing the tile on the start screen worked without issues since I had all the icons already in the project.
TLDR: YAY Microsoft, YAY Scirra, and YAY for Developers winning =)