The only time I've seen truly seamless transitions -- by which I mean the "fake" glide periods synced perfectly with the start of the "actual" glides -- was when playing Solo at a quiet time (early hours, UK time for me). If you're in Open or Group there's always a delay as the game tries to instance you with other players, and at busy times when the Amazon cloud servers (on which the game's back end runs) are slammed you get further delays due to sheer traffic volume.
Things have definitely got worse over time, too. There are a whole bunch of technical reasons why this might be the case, some of which FD might be able to address and others that are out of their control. Only FD has the telemetry to know for certain, so speculation is a bit pointless.
I notice you're in the USA so your results might vary depending on your proximity to the nearest Amazon server, but in general if you want to see how smooth the planetary transitions can be try playing early in the morning in Solo. It makes for a dull game if you like human interaction, but the illusion of seamlessness is far more likely to work.
All of the above plus...
I had flown to the alien crash planet to have a look for myself and was having horrendous instancing problems last night (UK) such that the game just stayed in that "halted transition" mode from orbital cruise to glide phase whilst it was trying to connect me with other player's clients.
Just sat there looking at me. After about 5 minutes of this I killed the game.
My PC is no slouch and neither is my FTTC. I could see periods of communication where
send and
recv were going sky-high (heh) as my client was trying to connect with other clients, then it just gave up and went back to a trickle again.
So I tried to be clever by rejoining in Solo, flying down to the location, deploying the SRV, dismissing the ship, and exit and rejoin in Open on the planet surface. Endless rotating SRV whilst it tries in vain to connect with other players. Again, killed the game after 5 minutes.
So yeah it's the horrible networking side which is letting things down.
In the end I just played in Solo and had a gawp at the alien crash site.
On the technical side, I still can't see why it's not possible to make transitions from Hyperdrive, Supercruise, and Orbital Cruise seamless and THEN try and instance with other players
in the background. It just doesn't make any sense to me to basically halt the entire game whilst looking for other game clients to connect to.
Perhaps an FDEV guy responsible for this side of things could explain why the above is technically infeasible?