I don't feel like it is. This wasn't something being built toward - the reason this wasn't all a TNG continuation to start was because it was the only way they could get Sir Patrick aboard. Heck, even now he pushes back against calling it a "reunion". I know there's a meme of post-TOS Star Trek not getting good until the third season, but it feels like if what they *really* wanted was TNG S8, they should have just kept wheedling with Sir Patrick until he agreed to do a mini-series or something.
That wouldn't have worked. If they had approached Sir Patrick like that he would have flat out said no if they had told him they were going to make TNG season 8 or a TNG season 8 mini series. He was literally planning to tell them no even before he met them. The only reason he met with them in the first place was out of respect. He was fully prepared to turn them down. The only reason he didn't turn them down was because they said "Picard is different now, time has passed for both him and for you, and we want to explore this idea". If they had said "we're gonna have a mini series with a TNG cast reunion and you'll be picking up where you left after Nemesis... the old uniform still fits, right?" he would have turned them down at warp speed, and no amount of negotiation whatsoever would have changed his mind. He doesn't need the money they would have offered him. Neither does he need the prestige that comes with being a series lead. He can pick and choose what he does nowadays, and he turned down a lot of Trek-related offers in the past decades because none of them interested him - they were most likely all built the same way, with a "Picard is still in Starfleet in whatever position and he has to go on another mission to save the universe and it's a nostalgia fest and he's basically still the same guy we saw in Nemesis".
He only began to change his mind when they shot "Nepenthe" and he realized how nice it was to have Frakes and Sirtis back, and to explore what the other TNG characters have been up to. That one is btw STILL the premise for season 3. It's not that they're all gonna walk in at the same time like "g'day Jean-Luc old chap long time no see". He has said repeatedly that they appear at different points and stages in season 3 and that every single one of them has had character development and a life of their own and none of them are the same they were when we last saw them on TNG. Yes, it's still TNG season 8 but it does come with this one premise Sir Patrick has always been adamant about - time needs to have passed, the characters are therefore all different (I mean is anyone here still the same person they were 20 years ago? No) and the audience needs to be made aware of it.
He did always say he wanted for the other TNG characters to show up on PIC as well IF there was sufficient reason and room for it, but season 2 obviously had very little room for this (except for Q's return, of course), so, it all HAD to be crammed into season 3, AND they had to find some really good reasons. I don't think they had it all planned out this way when they did the first season tho. I think back then the plan was still "when and if it's necessary to bring the TNG crew back". The fact that it's now all in one season is something that I'm very sure Terry Matalas pushed for the most. It's why he basically abandoned the second season and left it to Goldsman and focused on bringing everyone back for the third season, after all.