I am no big expert in Naval engineering, but I can't see wiring designed for 230 v. not be able to handle 115 v. All you have to do then is provide a small step down transformer just before each sub panel that services "hotel" functions, change that panel for a 115v. one and replace the various receptacles associated with it. Can't be that bad.
As for the rest: First, we already operate Thales equipment: The SMART-S that we are fitting on the HALs, not to mention the 501/502 radars on the IROs. Second, contrary to the Upholders, we would be getting a brand new ship - so no issue of rusted/degraded/seized/corroded parts from siting at the dock with improper precaution. Similarly, no issue here of fitting new torpedo tubes and associated combat system, which was a HUGE undertaking with the UK subs.
I would even say keep her after we get the Berlin's - especially if we only get two. The Karel Doorman is not a full AOR like the Berlin's, but she would be much better than nothing on a coast while one of the Berlin is unavailable. When both AOR's are available, then she could concentrate on the joint aspect of her function: train special forces or others in landing ops, provide support at sea for disaster relief, etc.
I am wiling to bet that after a short while, we would find her so damn useful that voices in Ottawa would clamour for acquiring one more, just like the ones heard right now for acquiring one more C-17.