While it may be simpler than more traditional X drive designs, it seems to lack in terms of structural integrity. For instance, each pod is realistically only mounted with two screws while the end points of the pods aren’t really held together. The “traditional” X drive image that you have linked is also not the most ideal in terms of building an X. A much more robust alternative would be something similar to a design that is based on 5225A’s Tower Takeover X-Drive but without the custom Lexan gussets:
This style has much stronger mounting points for the wheel hubs that are much more spread out and would prevent any misalignment in the C-channels.
(Note, this design does require you to drill holes in the channels to get proper mounting holes for supports, but in the end it will help increase the rigidity of the base and keep it as stable as possible)