v2 is still in developing, the 3d part comes next i believe.
v2 is much better at all because much parts are revised,replaced and some new features.
as a result of mutations at target os's agk can not be perfect,
there will come always new issues.
about the steam review,
consider, more man power will raise up the sale price
but the product will not implicit better.
v2 improvements:
ide with code folding and function list.
better handling of user defined types.
help of syntax completion at writing (Ctrl+Space).
better compiler.
new debugger.
"bug" fixes.
https://www.kickstarter.com/projects/tgc/app-game-kit-v2/description
AGK 108 (B)19 + AppGameKit V2 Alpha .. : Windows 8.1 Pro 64 Bit : AMD Radeon R7 265 : Mac mini OS X 10.10 (Yosemite)