Let it be known that most of the insanely biased pro-Perry arguments are completely without merit. To credit Steve Perry with as being the sole reason for Journey's success is absurd and baseless, if we went by album sales, Perry's debute with Journey -- 1978's Infinity -- doesn't even begin to compare to the Jonathan Cain's debute with Journey for 1981's Escape album. It has been offered that Neal Schon and Jonathan Cain cannot be solely credited with the fame given to them by Bad English's number one hit "When I See You Smile", yet again, we can associate that same logic to Journey's hightest charting song, "Open Arms". Penned both by Perry and Cain, numerous sources have verified the fact that Cain wrote the vast majority of the song, with Perry only adding "finishing touches". Ergo, I suppose we can credit the deaded Jonathan Cain for their success.

Using numerous trains of logic, people can make arguments pro-Perry, pro-Schon, and pro-Cain ad infinitum, and to use much of the flawed logic that is expanding like some online epidemic, we can completely isolate the talents of Gregg Rolie, Steve Smith, Aynsley Dunbar, and others.
The simple fact is that Journey did not begin with Steve Perry, and everyone here knows that. Of course, they weren't as successful prior to his arrival (no pun intended). But, to be fair, they were also created as a vessel for Neal Schon's prodigious guitar-work, whereas styles shifted to bands fronted by identifiable lead singers. When Cain joined, the style changed once again to the popular, mainstream functions of the early '80s. You can credit pure circumstance to Journey's -- or any band's -- success, not just the talent of which it is made up. Likewise, Journey was also Perry's vessel for success, as prior to the call from Herbie Herbert, Perry was on the razor's edge of giving up rock alltogether, and as has been pointed out, none of Perry's solo albums begin to compare to Journey's collaborative works.
So, no. Journey should not have changed the name. No part is greater than a whole. As much as I believe Steve Perry is the most talented of all rock's vocalists, I do believe that any incarnation of Journey > Steve Perry.