Everytime a new "individual" "acquired" "Kite's PC" there were always variations in its visual appearence. This includes characters such as Shugo, Azure Kite (yes I count his AI as a person), and the individual in Quantum, and this new individual. Granted by the time of the LINK storyline Kite and company (including Haseo) are celebrities and thus would naturally have copycats, it would not make sense to show a teaser of a copycat Haseo.
Well, in the case of Kite that is true. But that's mainly because of Aura. She made a shorter copy of Kite's PC for Shugo just for shits and giggles and to and to aid in Shugo's life long desire to become a Hero. Why she chose Kite's PC? I dunno probably to show Kite how much she thanks him for saving her. Azure Kite, again from her memories of Kite. Kite's the only person Aura knows of whose shown such kindness and such heroism, you ask her to describe the word "Hero" or "Kindness" in one word or ask her what first comes to mind, she'll most likely always say Kite.BUT, given with everything that happened in //GU I wouldn't be surprised if Aura started to feel the same way about Haseo as well as Kite. But let's not get carried away.
Now Quantum and the new Kite(Sora) character in //Link...I can't say much that's positive. IMHO what CC Corp did with that makes no sense to me but whatever. But with //Link anyway, all the characters save Tokio, Saika, Schiksal(excluding Geist) are AIs not really copycats.
Skeith merged with Haseo to save his consciousness
Skeith had nothing to do with saving his consciousness. Haseo's always had a strong sense of will; along with the help of Zelkova it was mainly Haseo who pulled himself out of the falling comatose.
Skeith has taken control of Ryu Misaki's character before.
Right but Ryu was comatose at the time and forcefully merged himself with the Sora PC through data-drain. The way CC Corp did, I guess they attached the Epitaphs to the PCs in a way that's "backwards" to where the player is the driver of the car instead of the car driving the driver.
On that note, I seriously hope this game does not continue with the LINK time traveling b.s., because lets face it all LINK amounted to was a fan service game/series.