What's her mental state like? If she's lacking mobility but mentally alert, a move might be possible, if she's beginning to get confused, each move is going to cause another downturn.
I'll tell you the experience of my dad in case it gives you anything to think about. Small home, 33 residents, good because all the staff know them all as people, what they like and don't like. They know me too. Manager is vary visible out and about, easy to get to talk to. Staff seem to enjoy working there, and turnover is low for the sector. Staff also give the impression of actively liking my father.
Dated, small room, not en-suite - this troubles him a lot less than I thought it would, and at least it gets him out walking if he needs the loo. Home does not smell of pee - some do.
Food - two choices at each meal, but if he doesn't like either they'll offer him something else like scrambled egg or fried egg and chips. Similarly he can have a milk shake if he doesn't want a cup of tea. Although they have a dining room, they let residents eat where they prefer - they'll bring food into their rooms, I think they discourage eating in the lounge, but I've seen one lady eating at a table in the reception area.
They let him get up and go to bed when he wants. We can visit whenever we like. They'll lend a wheelchair if we want to take him out. All this flexibility I think is more important than facilities.
The home is about two miles away, and that does make visiting easier. But since I'm usually there a couple of hours, I suppose having to drive half an hour each way isn't that much worse than driving 5-10 mins each way. Depends how often you think you'll visit? - a longer journey is less troublesome on a weekly visit than if you go several times a week.
Ours was an emergency admission, and it wouldn't have been my first choice because the other residents mainly have a dementia diagnosis (whereas as Dad has a "mild cognitive impairment" diagnosis, but I've not moved him because the staff are good and he's given a good deal of control over his life. I turned down the chance of a bigger room when it became available, because we all thought that this would exacerbate his confusion.
You've got a couple of weeks to make up your mind. Visit her as often as you can, at as many different times of day as you can, and talk to the staff, see what they say about her, and watch their interactions with other residents.