ZRH is plausible, even without proof. ATH a little more ? since it's primarily a low yield (tourist) route. Then again, the 767 has struggled with ATH range issues since the beginning - and a 330-200 would compete well with the DL 330-300 out of JFK. The US 330-300 would likely have similar range issues on the route and also have too much excess capacity.
I have not been able to confirm that a 330-200 will be used on CLT-GIG this winter. OAG and US schedules still show the 767 - although it seems the logical course to use available TA 332s on the route. I'd thought that if the GIG 767 was being replaced, that fact would be indicted in the global reservation systems by now so as to both attract high season connecting partner traffic (TAM) and most of all, premium traffic away from TAM at JFK.
IMO, the best decision US ever made was to install the Envoy suites into both the 332s and the 333s - and the worse was to delete the PHL Envoy Lounge - the perfect compliment. I mean why didn't they just cater it as the premium lounge during principal TA hours (e.g., 7PM-10PM) and a normal lounge during typical business travel hours (all the rest). IMO, the advertising of the existence of the Envoy Lounge alone, gave US that little bit of prestige is so desperately needs to compete with the big international carriers. Obviously, if there is an AA merge or US moves alone to OW, the Envoy Lounge may be irrelevant due the the existence of the BA Galleries in A-West.