I'd actually argue and say that Bass has a 4-6 match up against Lisa. Lisa can play better keep away, has more range on her OHs, has good mix-up and has a faster jab now. With new 9K and BT hip slam, she can deal more damage in combos. She has a running OH, which is something that both Bass and Tina lost from DOA4 onwards.
Some advantages Bass may have over Lisa include his massive damage potential and beefy throws. He also has the fastest 7i OH in the game from back turned, which lead to guaranteed combos and nasty throw set-ups. He only need his 50/50 from back-turned, but Lisa has access to more options from that position and a BT dash.
They're still at equal footing when it comes to strengths and set-ups, it's just that making a mistake against Bass would mean that you'd have to pay a higher price.