DRV2605: Floating the In/Trigger pin?

Hello,

The DRV2605 data sheet says that when the in/trigger pin is not in use, it "should" be tied to ground. Can I get clarification on this?

If I float this pin, it would allow a lower technology class on my PCB by letting me remove the pad and route the SDA line out through the gap. Will this cause any issues? Is grounding the in/trigger pin required, or simply recommended?

Thanks in advance.

Regards,
Alan