I suspect that the ice will be too thick to crash through. Some of the proposals for melting through the ice look promising, but the only exist on paper at the moment. I suspect that, unless we find some very thin ice, drilling is going to be out of the question. The weight of the boring equipment would be prohibitive. Besides if we do find thin ice.
I think what this topic is really highlighting is the need for orbiter missions first, to map Europa's surface in enough detail that lnding missions can be planned an carried out with a high probability of success.
NASA and other space agencies have always taken a step by step approach to exploration. First fly-bys, then orbiters and only then landers. This is how the explored the Moon and how they are exploring Mars.
In topic after topic I have defended this approach from people impatient to send landers to destinations such as Europa. This topic is a great demonstration of why NASA's approach is the correct one. If such ice blades do exist sending a lander to Europa would have a very high probability of failure. We need to know if and where it is safe to land, then, when there is enough information, the planning can take place of how best to achieve that goal.
I would agree with this,step by step approach if we just sent a lander first and it was destroyed when it landed BOOM wasted money,wasted time.As you said map it out first.
Do you think the radiation or magnetic field from jupiter might make things harder?Im no expert on the issue but some things i have read in the past almost make sending anything electronic their impossible.