That's exactly what I would like to know -- what are the trade-offs involved in going with my preferred solution of changing modified non-enumerable properties

That's exactly what I would like to know -- what are the trade-offs involved in going with my preferred solution of changing modified non-enumerable properties to be enumerable? Every possible solution to the problem could create breakage somewhere, so what is the breakage that would be created with this solution and why is it less favourable than the solution they ended up with?