I just wanna comment on one thing,

It's a really hard thing to do to make a spin-off and keeping the same quality with the original. House of Dragons did it so well and started so good and simple. Story in my opinion didn't so complex as Game of Thrones but story progressed in a clever way. We saw only what is necessary.

As story progressed characters started to explore different parts of their journey.

I fell in love with the first five episodes but

who told that changing two loved characters & keeping all others as "older versions" is a good idea?

It's not, think it as you watch Jon Snow as Kit Harrington and suddenly story jumps 15 years and Kit Harrington changes with X, Emilia Clarke changes with Y and all other actors/actresses are the same?

Okey i understand this is a different concept, but seriously?