Everything is going cheap in the world of Tassimo disks currently. Despite hundreds of bad reviews, they keep on charging ahead with bad decisions.
The Chai Latte is the latest to get the 'new and improved' treatment. Previously: real milk, real tea (two separate disks). Now, a single disk, containing 'instant' tea powder. It's a horrible drink now!
If you've already got a tassimo machine, keep it - you won't get back to what you're used to with any other machine, but you can do a few things:
Want to get back to something resembling your 'old' Lattes? Buy the espresso disks, and a load of milk disks! You'll need two milk disks and an espresso to make a latte. Want flavour? Just buy a flavour syrup!
Chai Latte? Similar deal. Buy milk disks. Run two milk disks through, and whilst that's going on, stick the kettle on and use a Chai tea-bag to make a very small cup of tea - let it brew to your desired strength and then pour the tea into the milk - you may need to sweeten to taste.
Now this all defeats the purpose of having a drinks machine like this of course, and that's why I would say if you don't currently have a Tassimo machine, don't get one (and if your current one breaks, don't replace it).
The strength of Tassimo was always that it made a whole variety of drinks, and used good quality ingredients to do so. JDE seem quite happy to trade that advantage away in the name of cost savings, and there really is no alternative on the market that does the same job now.
If JDE don't change course, I'll probably look toward Nespresso or Dolce Gusto for my next machine. This will leave me still needing to use some of the above methods for making Chai Lattes for example .. but that seems to be about the only options.