Skyman,
Yes, Delta Connection are approved to do Modular CPL training. They have a joint approval under Atlantic Flight Training in Coventry's FTO. How many hours have you got? Do you know what you need to do to convert?
Typically what happens is you would need to do all of the ATPL theory which takes the most time (anything from 6 months to 1 year). Once you've completed the theory you will start flying, but that should actually only take a couple of weeks, again I'm not quite sure of the exact time frame - it depends on your experience.
The one thing is that you can't do your Multi-IR flight test here. It has to be done in the UK.
To answer you other question. Nothing has really changed except for the name since Delta took over Comair
I can highly recommend the Academy. The standard of training is excellent and the courses are well run.
Hope this was helpful.
C_F