"As for our dear Anne, well, she gets fresh air and exercise and the admiration of a certain Mr Elliot on two occasions."

There's also attention from Captain Wentworth as well: Capt. Wentworth notices Mr. Elliot check her out on the stairs and gives her a look that says he sees "something like Anne Elliott" in her afterall. This is a change from "wretchedly altered," indeed. Also he displays a little jealousy at breakfast afterward when Mary is going on about what a pity they weren't introduced to Cousin Elliott.