He may find it more difficult to sell, or he may have to re-instate.
Or he might find that the buyer doesn't notice until it is too late.
But as long as people are aware of any potential problems in the future, they should do what they want to their houses, and accept the problems of which they are aware, unless they have embarked on a programme of buying, doing-up, selling soon after, repeat.
People here have pointed out what they think are drawbacks, or flawed reasoning, in the OP's plans, not to score points, but because there's always a chance that he might have said "ooh - hadn't thought about that". Imagine, for example, someone who didn't know how a loop-at-the-switch lighting circuit was wired casually deciding to disconnect cables, remove switches and plaster over the holes.
And I don't know about EFLI and Bernard, but I don't appreciate being accused of deliberately trying to start an argument and upset someone for my own fun simply because they disagree with what I perceive as drawbacks or flawed reasoning.