Except not really . I have not seen sports game (usually) removes existing features and modes , especially multiplayer ones and especially only to resell them later on . Hell , when PES lost some of it's customization options (coupled with many over issues) there was hell to pay and major outcries
And you say that you'd rather have that than "rb5" , but as it is , we did not even get something equal to a simple port of rb3 on ps4/xb1 ... but something inferior in many aspects
Madden, NHL, NBA all had features removed from them when going from last gen to this gen. And even up to this year NHL still doesn't have everything that NHL 14 had, almost 3 years ago.
Harmonix doesn't have the big publisher anymore to cover costs for expensive things, like online, which costs a lot of time and money to do.
They had a survey they sent out before the game was announced asking what was most important to players, and the top answers were that they wanted their old dlc and instruments to work. So that's what they focused on.
Since launch, they've added things in over time, and now we're at the point where they're ready to add new modes that have never been in a RB game, like the new story mode, and the Rivals mode. And obviously online is gonna be behind a paywall because something like that couldn't just be free. Online play on their survey btw was near the bottom for what people wanted, which is why they didn't have it at launch.