I guess we will need to see how it works with proper testing. If the new talents (+1/+2/+3) feel at the right value for 3xp then it's all good, and a change in talent cost I will have to get used to. The suggestion to upgrade the dice was to make the talents feel of equivalent to 5xp or more and to make them more exiting than a vanilla +1/+2/+3 but as you say it might throw the whole thing out by giving too much of a bonus.
At the end of the day these are just out suggestions, I am sure the team at Fria Ligan will come up with a good solution.