In most cases, draw calls aren't a problem for us - the OpenGL API (and WebGL inherits this) is designed to be able to batch a lot of work with few draw calls,

In most cases, draw calls aren't a problem for us - the OpenGL API (and WebGL inherits this) is designed to be able to batch a lot of work with few draw calls, and the Construct 2 WebGL renderer uses a batching system accordingly. (Note we have a 2D game engine so it's a bit less demanding.) Of course you can make worst-case scenarios which issue lots of separate draw calls, but most cases work nicely. For example if you create 1000 of the same sprite in Construct 2, it can issue a single drawElements call to render them all in one go.