I agree with PPs who have said that it all needs bringing to a head - like a virulent spot or boil that needs lancing. The 3+ years of uncertainty are far more damaging than knowing a direction at least.
Suspending Parliament isn't 'undemocratic' as it is a procedure within our system, it even has a name - proguing; it might be rarely used but it is part of our democratic political system.
I'm sure there will be challenges to this, and I do await them with a genuine interest - my only wish would be that these challenges actually do something concrete rather than prolong the 'uncertainty'.
Amongst my suggestions for 'challenges' to proroguing:
So far, no one has identified the 'constitutional role' of the CofE yet - the intertwining of Parliament, Crown and Church is all part of the UK's unwritten Constitution - maybe there's a challenge or 2 there.
The Scottish Parliament - a challenge or 2 there as well - hardly right they can be suspended too?
Setting up a separate Parliament - might I suggest Rory et al decamp to Stormont - empty buildings needing Occupation.
The EU grant an A50 extension without HoC requesting it - maybe the request can come from ScotParl or the separatist Parl in Stormont.
HTH