Valerian missed the mark; I'm sure it's got great designs (although I also believe it's mostly CGI), but the story of the movie is disjointed (which is a risk when trying to merge multiple storylines into one) and the actors are lifeless.
I've grown to like Valerian over rewatches, but unfortunately it suffers from Besson being a massive Valerian fanboy and trying to stuff everything he possibly could into it... I think he'd have done far better if he'd gotten a more limited budget, or had to produce three of them for the cost of the one he did...
I know, hence why I think he should have gotten a smaller budget so that he was forced to try to contain himself to one story. Then maybe it'd have done well enough for a sequel as well... It feels like he got into it thinking he had this one shot so he better see how many things he could put in it, and as a result ensured he got only one shot...
The Fifth Element and Valerian and the City of a Thousand Planets are widely considered to share a thematic and stylistic universe, with similar aesthetic influences. There are shared elements (ha!) and aesthetics, with Valerian even featuring a shop called "Korbens" as an easter egg to The Fifth Element.
Unfortunately the movie doesn't do it for me, the 90s were a better time.
Once CGI became good storytelling and creativity took a backseat in Hollywood.
The Fifth Element has similar cinematic feeling as the first Blade Runner.
And now it is clear. There is the same person behind it :)