Would a new arch of different design perhaps keep everyone happy?That Arch was pig-ugly and in the way. I just don't get why people keep harking back to the thing. Leave it in the canal.
Incidentally, a straightish tunnel from Old Oak Common to Waterloo/Waterloo East would be shorter than the (curved) tunnel from Old Oak Common to Euston, and would be under parkland for about 60% of the way, making work sites easy and subsidence an irrelevance. Waterloo and Waterloo East have direct trains to nearly everywhere in Central London and England south of the Thames: Euston has trains to, er, Birmingham.