Some good points here.
AIUI it's not currently a legal requirement for an A/C to have de-ice/anti ice eqpmt for IFR flight so why would LAA be any different?
I'm 100% sure that if IFR were allowed on LAA a/c then there would be a mass exodus from CofA a/c. The modern LAA a/c are leagues ahead in terms of equipment capability when compared to your average PA28.
My Falco costs me £85.00 ph to run wet and is equipped with dual screen glass cockpit, (I have a GNS430w that I can install in a weekend), auto-pilot, strobes etc.
I have an IMC although not current, and would be delighted if I were able to use the capability in the same way as I could a crappy PA28 at 1/3 the cost with no safety cost to anyone.
I would fully expect to have to pay more for the permit and don't understand why there would be any extra burden at all on the LAA save for the initial effort of making the change in law.