I too have noticed this, as I'm sure most have. Personally, I'm fine with it. I think this was done for balance reasons and give lesser tier characters more of a chance.
I don't see most BnB's in MK X doing more than 40% if that much daily. I expect the 20-30% on average with damage in combos, however I'm sure there will be some larger. I just don't see a huge amount like MK 9. I remember when Ermac pre patch had easy 40-60% combos that were very easy to do, and KL having big combos. I don't see that this time around lol with anyone TBH.
I'm fine with it, plus Tyler and Derrick also said a few times in various streams that they also made certain characters in this game for "players who aren't all about fancy combos but just want to use specials and perhaps zone" Of course in time everyone improves and will do, learn bigger combos, tactics etc but I do like that thinking.