This reminds me of an art concept I saw of a lizard variant called the "Hell lizard". It was a variant between a red and black liz. This is even more terrifying than what I envisioned. Awesome! (edit: I just realized, is this a replacement for the black lizard or a separate entity? I hope it's a unique creature)
So I'm not sure about giving those lizards superior sight on top of their hearing (kinda feels anti-thematic for a lizard based on the fact it's totally blind but has keen hearing), but what I agree on is the antenna part. Just that would be enough to make the mole lizards more challenging, since it would make any errors on your side way more punishing. Any sound you make could attract every (upgraded) mole lizards in the area as they would share the info to each others and would each cover/inspect their own tunnels, to more accurately pinpoint the source of the sound.
This is awesome! Terrifying but awesome! If you ever make a full mod pack out of these, I'm sure countless lunatics would be up for the challenge - but maybe a custom slugcat is in order with a leg up or two to prevent you getting stuck somewhere. Doesn't need absurd superior movement or spear power, but maybe giving them something along the lines of the White Lizard's camoflague when slow crawling/stationary to help navigate the superior senses of certain lizards could make it more of a thoughtful challenge to work around. If that's even possible, mind.
These are Lurker lizards, they have evolved to hunt using both their antennas and eyes, they also gain IQ, that's why they team up with spitter spiders