what you're proposing is only saving you the time it takes to exit and enter the next node. Not sure how much of a difference that will make as far as reducing the timesink.
Also, this change only benefits players with great rosters. The players who are actually struggling with GW don't benefit at all, but for those players GW is much more of a time sink than for players like yourself (assuming you can play gw from start to finish in 15min or less).
Your sollution to the timesink problem doesn't have a negative effect for me personally, eventhough i find GW to be the most fun mode ingame. So it's fine by me, i just don't think it solves anything really. No offence.