No, it WAS assassination. Someone simply being written out of character implies that they went back to being written well. Bart NEVER got better. (There were brief instances where he came close such as in Legion of 3 Worlds and to a lesser extent, Kid Flash Lost, but it was never consistent.)
Ignoring the fact that he doesn't act the same, my big problem with him becoming 'Kid Flash' of all things comes down to one factor: Max Mercury. Bart and Wally were not close. Bart didn't know Barry. The most important person in Bart's life, without question, was Max. If he was going to change his name to ANYTHING, it would be to something like, as the fan-comics I've posted here show, Kid Mercury. And the insult to Bart's surrogate father is only made worse by the fact that ever since Impulse ended, Max has been shafted. (In the 15 years since the book ended, Max has been in limbo for 8 of them, and non existent for 6 and counting.)
Still very good! It was even during this interlude that we first met Cissie King-Jones. This book managed the almost unheard of feat of having almost 100 issues without any truly bad stories. Well...the book doesn't end well, but that's because of editorial, and Degazo was clearly trying his best with the hand he was dealt. (Basically sums up all my favorite books, really )
I enjoy Robin and Superboy, but I think Impulse blows them both completely out of the water in every way.