disneyshopper
I'm on the road a great deal, too, and it makes no difference. Unless I'm out of cell phone/wireless range, I spend a minute or two checking listings that will lapse that day and end them if I so desire. If I think I'll be out of cell phone range for a while, (do a lot of hiking in the high mountains and bike riding in remote areas) I simply end them for that period of time, or change my handling time to 5 days or whatever.
After all, don't you need to pack sales and communicate with your buyers and prospective buyers on a daily basis? That's a good time to make a quick check. I couldn't 'set it and forget it' - I'd lose my living. 
If you are using the Seller Hub, just add a Start Date and an End Date to your columns and sort by END DATE. You can quickly look at your Active Listings to see which ones you might want to end before they roll over.
It is common for the sellers that are upset with this change to feel it is a "money grab". I'm not sure why, but they do. The vast majority of the sellers that are having trouble with this change are those that ship no more than their free allotment of listings allowed each month. So if that is how you run your business, then you aren't going to be paying more next month when your listings renew that haven't sold because you have your new month of your free allotment of listings.
So the key to resolve the problem of wanting to list more is to sell more. The more items you sell, the more available listings you have from your free allotment next month. Without a store you have 50 free listings per month. You can track how many are available at any given time by looking at your Seller Hub.
Looking at how you are listing now and improvements that you could make may help you sell more of the items you currently have listed. If your willing to get some suggestion on how you may be able to adjust your listings a bit in the hopes of getting more sales, just let us know that this is something you'd like to entertain.
There are ways to work with the GTC issue. I know it can be very hard. But it is what this site offers, so if you want to sell here it is what we all must deal with. GTC has been around for years and it is highly likely that even before it became mandatory for fixed price listings, the majority of sellers were already using them for years. You can survive this. You may have to restructure the way you want to sell a bit, but it most certainly can be done. And who knows, once you adjust, you may just like it.
If people feel like they are being charged and treated fairly, then of course solutions can be had-like to set alarms for yourself to end items and re list them at certain dates during the month. For me and others it doesn't make sense to host an eBay store any more and that's okay! I'm not sure why I ever think that any of the policy changes will be heard by community and revised, they aren't, they are quite literally only made even worse, more complicated and/or more costly. I think eBay has too much "stuff" to wade through now, and I'm far too busy to re-learn and deal with constant changes and revisions. I am not sure why so much complication is put into what is simple: List, sell. The end. I don't need a thousand gimmicky things but maybe others do. It's kind of like the smartphone. I just need it to do a few tasks, but I know it can also go underwater and has a million apps available. To me, that just confuses the real focus. So if eBay works for you, great! With a small profit margin-eh..it doesn't make sense for us. I am seeing a huge spike in sales with Mercari so this was the appropriate solution for us, obviously. As I was typing this, I sold two items on Mercari. 
@fern*wood wrote:I'm surprised someone hasn't developed a program (for a nominal monthly fee of course) that would automatically end the listings for sellers.
I believe they have. Sixbits.
