There will almost definitely be a season 2 - it's been stated right back from March where they said the story "would be told over multiple seasons". It wasn't explicitly stated but was pretty much confirmed. Coupled with the open ended and frankly brief story, it's clear they are gearing towards an expansive story, told via multiple seasons.
As for a review - mostly I love it, but back in March I really hated certain aspects. It's been done to death but always-online Denuvo DRM bullshit was a complete slap in the face, rendering me unable to play the game for months on end. Thankfully I've moved house now but prior to that it was awful.
I love the ever expanding content, the elusives in particular. The level design (for the most part) is fantastic and expansive, with a multitude of different ways of taking out targets. I'm personally not a fan of timed opportunities and sometimes it can make the game feel stale to have the same thing happen every time you enter a room. Another personal gripe is the lack of animations for weapons and the same 5 american actors being in every level....ROCCOOO!
Having said that, the sound design is fantastic. Whilst the music is relatively tame compared to previous entries, the sound effects are great. Guns sound punchy, the clatter of a magazine hitting the floor to the different sounds for walking on stone or carpet (one of the few things that really impressed me about Bangkok).
Overall, for a £40 game I've had enormous fun and I would recommend it! However, I've had enormous fun in pieces. Waiting for months on end (Paris to Sapienza, Marreksh to Bangkok) left me feeling apathetic about the release schedule and the game in general. As the whole game is out now (excluding 'Landslide') I love the complete package, but next time I will wait until the whole season is out.