I must admit that I had to read that twice to make sure that I was not being deceived. While some SP updates, TS12 and TANE come quickly to mind, have been "less than optimal" and a few have been outright disastrous, I have read no such criticisms of TRS19 SP1 in these forums or experienced any such issues myself.
Case in point. TANE SP1 was one update that I was glad to see the back of. It caused me no end of problems. TANE SP4 is by far the best version of TANE.