He was the only good thing about the Spider-Man movies. If you have a good thing like that, why wouldn't you change the script and turn him into a major plot point instead of an amusing bit character? What a waste.
If you were wondering which direction they would take Portal, the increasingly challenging puzzler route, or the cutesy internet meme cake is a lie route, this video should answer all your questions.
To be fair, Valve had no idea the whole Companion Cube and Cake memes would even arise when they made Portal, and they consciously made the decision to not bring those ideas forward into the sequel. If any new memes arise from Portal 2, it's still not something anyone intended beyond use in the game (i.e. a running gag, or a catchphrase for Cave, etc.).
Nice job judging the game from an ad, without having played it once. Now I know to never pay your worthless opinion even a second of attention.
How dare they have memorable writing in the first one, and now they're making funny ads for the second! WHERE WILL IT END PEOPLE?? WITH MERCHANDISE?!?!