Personally, I only bother with alternate routing in case a diversion is very likely (weather close to, or below limits). I think it's a bit overkill to do in CAVOK weather on an airport with two or more runways (e.g. MXP). In reality, you're probably likely get radar vectors, especially if the alternate is very close by (MXP-LIN is a great example), or radar vectors and then at some point a direct to STAR/IAF for the alternate airport.
KISS principle works great with these things.