Actually, a major 3rd over a minor chord can work very well, depending.
Also, you do know that the "pentatonic" scale just subracts that one note? So, I would stop the mindset of "pentatonic OR blues", because it's very limiting. Use the scale as a general "shape" or "pattern" to follow, but don't be afraid of notes "outside" of the scale....that's usually the most beautiful note you'll find, to spice up your melody or riff.
I guess I'm also a little confused on your original post, vs your last response......what are you REALLY looking to achieve with your blues playing? I'm sensing a general "reluctance", based on your responses (ex: "I've never been much of a lick player...." or "I guess I'm not looking for blues licks I guess, more pentatonic licks...."). I would encourage you not to shy away from an idea, without trying. I don't think anyone here is trying to turn you into a "lick player"....in fact, I was attempting to do the opposite by offering to post a video with several suggestions, tips and ideas. But with all the suggestions so far, it doesn't seem like you're really trying to get that guitar in your hands and TRY out some of what people have suggested so far. Perhaps I'm just reading into your responses too much, but I can't seem to find the "Thanks guys!! I'll give that a try!!" attitude, that really helps push many GMC users to the next level.
I'm sorry if I'm judging your attitude wrongly, but I re-read every post and still feel that you have more "reluctance", than "acceptance" to try these new ideas. If I'm right, I would suggest trying a more open minded approach to everything guitar-related. Again, I'm not trying to "bash" you or be mean....really just trying to support another player, and help move you along to achieve whatever you're trying to achieve with this post.
I hear some players throw in the odd minor 3rd etc in a major progression and as you say it sounds really sweet.
I guess I'm not looking for blues licks I guess, more pentatonic licks that fit nicely in songs where anything bluesy just seems like a round peg in a square hole.
My lack of blues based lick knowledge just seem to show it self up when I tried to work out a solo for the Slash style collab and came up lacking
I've never been much of a lick player and more of a person that creates melodies with my solos, but licks and sequenced patterns definitely have their place