Wow, the new campaign looks really nice.
A few suggestions:
1) I couldn't find where to change the difficulty for the campaign. Is this an option? If so it might need to be more obvious
2) Unable to save multiple campaign attempts (someone's mentioned this before but worth repeating as it is pretty important)
3) Occasionally when you beat a campaign level it comes up with the message "your lawyer has discovered a new patent" or something along those lines. You can then select 1 of 2 patents you'd like, however it only says the name of the patent, not what it does. (experienced players will know what all the patents do, but newbies won't so it would be nice to have the description in the selection box).