Canopus

If you find a specific signature being too large or otherwise strenuous, it's possible to hide it on an individual user basis by hovering over the signature and click the X appearing to the right. Then you will have the option to either hide all signatures or opt-out specifically for the selected user. But I haven’t yet found a way to restore a user’s hidden signature.

This forum looks better than I’d feared but I’ve found one fundamental flaw: the fixed text area is much wider than the old forum so taking the default font size into consideration the width of each text line becomes unnecessary long. Comparing the line width with the old forum shows that there's about 35 % more text on each line now, just enough to cause eye strain (at least for me).