A few ideas to consider -- from a non-expert who nevertheless has done lots of skiing on glaciers in the European Alps, together with European partners of different nationalities and training + certification backgrounds, and who has observed lots of Euro ski parties on glaciers - (and who has skied solo lots on Euro Alps glaciers).
* crevasse rescue with a 2-person party is serious and tricky and difficult in the best of circumstances. Then consider the actual event with broken terrain, worsening weather - (and partner injured because he was not roped when fell in?)
* therefore a key safety factor is to be able to summon larger rescue party with serious (heavier) equipment -- by choosing to do your tours in areas with good mobile phone service, and carry a phone with a SIM card with good "roaming" service, so you have a chance to get a connection, and know the mountain rescue phone# for your chosen region -- (and think about consequences of "saving money" on your trip to Europe by getting a cheap international phone plan). Certified mountain guides who lead ski tours in areas with any question about phone coverage are required to carry two-way radios which are easily tuned to local rescue frequency.
* SPOT or other satelite rescue beacons likely will not work if the person carrying the beacon is down in the crevasse (or outside the crevasse but on the north side of a steep cliff or mountain peak) -- because the satelites are in near-equatorial orbits (while the Euro Alps are around 45 degrees latitude).
* Most skier crevasse falls are unroped, which has the interesting consequence that those victims who survive the first thirty minutes without dying from head injuries or internal (or external?) bleeding, often get _wedged_ down into the narrowing walls of the crevasse. Often the victim's harness is surrounded by compressing snow/ice, so rescuers simply cannot connect a rope or helicopter winch cable to the harness.
* therefore (perhaps more important than a rope) is to wear a sling or lanyard or PAS leash attached to harness (belay loop?) and also connected high to your shoulder, so the well-equipped rescuers have a usable attachment point for the winch cable.
* the probability of punching down into a hidden crevasse in the same area of a glacier - (somewhat like with Avalanche hazard) - varies widely with recent snowfall and wind, seasonal snowfall history, overnight re-freeze temperature and sky cover, time of day and temperature, etc. If you learn about those things, you can choose not to go out on more dangerous days (and in more dangerous years).
Ken