It's only science
XY2 uses heavy duty 80x40mm sections, to construct a sturdy frame.
XY2 uses a 'H' construct to support each axis, rather than the more typical cantilever approach.
XY2 uses 'proper' (IGUS) linear bearings (not drawer runners or similar) with polymer sliders, which offer several benefits over ball-bearing slides.
Use as XY (NC) Drill
There are not any perceived limitations of the drill function within the specifications stated.
Use as Router
As the XY2 is controlled by the MACH3 software, there is virtually no limit to the capabilities of the X-Y table. Obviously there are practicalities such as removal of dust/ swarf as well restraining the item which is worked upon. In additional, because the system is controlled by stepper motors there is always the possibility that the system may lose steps due to excessive torque requirements. It is up to the user (i.e. you) to ensure appropriate feeds and speeds (depth of cut) to prevent missing steps.