As completely irritated as I am at Disney for making this ridiculous decision, I do have to interject...
The route you *have to* go now to get to the parks is the EXACT same walk PPH has clearly marked out for guests since...well, since our first visit there in 2007. Their signs to get to the parks do NOT take you out the front door and to cross the street. Their signs have, for 10 years at least, directed you out the side (or back? never clear on that), over to DLH, and alllll the way through DTD.
A while back I used mapmyrun to work out mileage. I went from a hotel to to the center of the esplanade in between DL and DCA. (I rarely used the entrance to DCA because unless you're starting your day at Grizzly or beyond it's not that awesome and the lines have always been bad)
Our room at the Grand was .38. That was the one time I went from our room because our room was about the second furthest away room you could get, because it was almost at the end of the wing but you couldn't use the secret exit to get to DTD (wrong wing). The backtracking was so obnoxious to me. Outside the hotel building of HoJo to the same spot was .46. DLH at the sorcerer's hat to the esplanade center was .43. PPH going through the Grand to the esplanade was .47. PPH following the signs was .63. So YES this is a difference, but given how much a person walks in a day at Disney...it's a relative drop in the bucket.
For us PPH is great enough that it's worth staying there (though IMO *none* of the
Disneyland resorts are *worth* what they are charging now) if the cost is good to you. It's pretty, the staff have always been kind, the rooms are big and bright and airy and fun. It also helps that almost every time my family has stayed there we've been upgraded to a suite LOL. Seriously lucky in that respect.
But a .18 mile difference... IMO not worth worrying about.
And I think you can still exit the Grand (to get back to PPH) by going through the DTD entrance to the Grand. So if you've been in Disneyland and want to go home, you walk to DTD. You would just go through security into the Grand then exit the Grand once you get to the lobby. And that security is on the way to the "proper" path back to PPH, so if by chance they won't let you enter, you haven't lost anything. Just continue on through DTD.