Steele played LT as a freshman and Senior. He played RT his sophomore and junior seasons. Collins only played LT his senior year and Junior year but played at LG as freshman and Sophmore. So your most experience LT is Collins. Collins even started on the left side of the Cowboys OL at LG. Flip them (Steele at RT and Collins at LT) and move on.
However, your most experienced LT is Connor Williams who stated all 3 years at LT for Texas. I would have kept Steele at RT, played Collins at LG, and Williams at LT. That would solve his power problem as he would not be taking on +325 pound DTs. Williams is very athletic but has been bulked up to play LG. However, he could be a capable LT in the NFL, not on par with Tyron Smith, but better than the rest of the Cowboys OL at LT (excluding Smith).