I assume you mean that it's two weeks between flying into Zurich then flying out of Paris. This means of the two weeks at your disposal, you will want to set a day or two aside in Paris for its necessary tourist stuff, Parisian fixes, etc. etc.
If you arriving in Easter (i.e. late March, early April), most of the snow should have melted by then (except possibly in some areas higher near glaciers), but the weather will be very pleasant.
If you intend to go via Lyon along the way - and I have no aversion to going to Lyon - trains to Lyon typically will route you through Geneva as the most practical option.
As a follow-on from this, between Zurich and Geneva there is lots to see in between, and allowing for residuals after Lyon and Paris, you're now down to just over a week, assuming there's not many other places in France you wish to go to.
Now what would you like to do whilst you are in Switzerland......immediately if I had to decide just on a whim, I would consider something like this:
- Day 1: Arrive Zurich, do Zurich sightseeing.
- Day 2: Day trip to either Schaffhausen (Rheinfalls), or St Gallen and Lake Constance. Return Zurich or overnight in Chur (whichever one has cheaper accommodation).
- Day 3: Travel to Chur, take Glacier Express to Brig/Visp. Take train to either Interlaken or Bern, depending on accommodation options. Soak in a bit of the city you're staying in the evening.
- Day 4a: Travel to Zermatt and to the top of the Gornergrat; or
- Day 4b: Travel to Jungfraujoch.
Return to accommodation base, or move onto Luzern if accommodation cheaper.
- Day 5: Travel to Luzern. City tour, Swiss Transport Museum, or even Mount Pilatus (or a combination of each). Travel to Geneva.
- Day 6: Spend day in Geneva, then stay until leaving for Lyon next morning or travel to Lyon that evening.
That's just one possibility. Unfortunately, because of time constraints and, in many people's opinions, budget constraints, it's going to be a case of pick some nice things and do them, rather than actually relying on some surefire suggestions. Most of Swiss tourism is focussed on the natural beauty - alps, lovely green environments, hills, and all of that coupled with a pretty reliable train system that makes it all both possible and pleasant. The 6 day plan I've suggested
as a sample also works nicely with the Swiss Travel Pass for four consecutive days, priced at CHF 251...I haven't done the absolute math, but on a straight-up guess you'll definitely get your money's worth on this (I would use the pass on Day 2 through to Day 5 inclusive, and buy normal fares for Days 1 and 6).
The Glacier Express is a nice panoramic train through the southern Swiss alps. It's hard to take good photos on a moving train through window panes, but if your immediate interest is not attempting too much or any photography, you'll have a very relaxing 5 hour ride across the alps. You could skip it if you wanted which will give you an extra day to explore somewhere else (then you would simply go the north route from Zurich, e.g. onto Luzern, Bern, Interlaken, etc.)
Swiss Travel Pass gives you unlimited travel on bus, rail and ferry services throughout
almost all of Switzerland for its duration. Some services, e.g. special cable cars, rack railways or panoramic services may still require compulsory reservation fees or may only offer a discount rather than inclusive travel. Still, considering a one-way rail ticket from Zurich to Bern is about CHF 60 for a tourist, depending on how much travel you do each day, you can easily make your money back, with the added convenience of not having to worry about buying too many tickets.
You'll find chain hotels generally scarce in Switzerland, especially outside the major centres - Zurich, Geneva, Basel, Bern and Luzern. IHG has a few dotted in the cities; Hilton has only Zurich and Basel (if I'm not mistaken); Accor has a tad more penetration I believe (especially in Geneva).... people say that Zurich and Geneva are almost impossible to find a decent place to stay without an expense account, but you can still find reasonable places around for between CHF 90 - 140 per night. I wouldn't be too set on trying to stay at chain hotels. Note that accommodation in places like Zermatt which are predisposed to be filled by skiers or other sports / terrain-enjoying tourists that are far flung out are likely to be expensive, but if you're set on it, you might want to check the prices anyway.
Feel free to post more questions, but I hope some of that might have piqued your interest.