YMMV
I've happily used a T-32 with my OM-2S since I bought the camera new in the mid 1980s. It does actually work well.
My only complaint with the T-32 is that although the bounce function works well, it lacks swivel. I do, however, have a number of the TTl auto cords that permit retaining TTl functionality when I move the flash off the hot shoe.
I also have a Vivitar 4600 with the OM TTl dedicated shoe. It adds swivel so that is good, but the extra size and height is both good and bad. The extra height gives better modelling with landscape orientation shoe mounted flash, but the extra size and height is bulkier and has the potential to put more strain on the camera's shoe.