Hopefully it will put the overly skilled players out of reach of the ones that just try to have fun without much worry of getting spawncamped in the first minute of the match
You mean by those who use the new Opening Gambit ability? ;)
No seriously, the Splatfest changes could mean exactly what you suggested (although I never recognized this as a problem). But it depends on how much more initial Splatfest power you get for your rank. If the difference isn't too big, anybody with a lower rank could still reach the Splatfest Power level of someone with a higher rank, depending on how long they're already participating in the Splatfest.
Of course, the fact that a higher Splatfest power level also gives you a slightly larger boost makes it even more likely that high rank players will be battling among themselves.
But in the end, it only says "more likely". :)