Have to agree, Tesco are crap at getting new stuff - they always seem to be last and Sainsbury's and Asda are always first! Tesco have only just got the 2 new(ish) Comfort tropicals, the new P&G '2x' liquids and the new Bold and Lenor products too - and not even the full range at that.
And they are ALWAYS getting rid of stuff, then it mysteriously reappears months later. Persil & Ariel Colour powder 30 wash packs went for a long time, just because Tesco didn't think we should be able to buy them it seemed, but both are now back (for now).
I noticed Persil Bio 50 wash packs now have "discontinued" on the shelves in all Tescos near me too - but there's plenty of Tesco own label crap and shelves heaving with various Non-Bios as well. :-(
It's like that with all products though - I hate Tesco's (and the rest) "you can buy what we say you can buy" attitude.
I did spot the new look Comfort concentrates in there though - they now come in a very odd shape bottle indeed!
Persil with Comfort is weird - the Small & Mighty version is rank. The powder and tablets, well it's just Persil with a different scent. When it first came out it had a really hiked up price, but I think they soon saw sense and eventually priced it in line with other Persil products. It's pretty pointless as it's not a 2in1 like Bold and there's no added benefit over regular Persil Bio.