Some software design guidelines

Programmers are inherently encouraged to be lazy, so they'll follow the easiest path assuming you're careful to actively encourage that... if you're not really careful about exactly how "obvious" you make your intended path (Hint: It's never obvious enough) then you wander by a few weeks later and there's a giant Rube-Goldberg construct blooming in source control.

As per all generic advice, YMMV.