While I understand the sentiment, USF has a similar "first park/flagship effect" to Magic Kingdom (nowhere near the same scale as MK's relative to WDW's other parks, but it's there).
USF will almost always be the most visited Universal park in Orlando. I'd be surprised if that ever changed.
The reason that I say that is because most one-time visitors to Orlando really don't know what's in the parks; WDW visitors usually go to MK first while UOR visitors go to USF first. Yes the more savvy repeat visitors may plan their trips to target specific attractions, but that doesn't seem like anywhere near a majority portion of guests. Most parents with young kids are really just checking off a list "I took my kids to Disney World (Magic Kingdom) or Universal Studios"...; it's really only the families with older teens or guests in their 20s or 30s that are probably the most savvy at what's in the parks.
Now there is a reasonable chance that additions like Nintendo and Star Wars are so splashy and have a huge impact on mindshare that their parks receive a disproportionate boost, but I don't see how it could ever be a negative for USF.
Universal (and Disney) executives know that USF (and MK) will always receive an unfair advantage in terms of mindshare as the "first park/flagship property" which is why they spend so much effort trying to get people to go to the other parks.