Original plan was...

Envoy 700 to PDT
PSA and PDT only CRJ operations
Envoy e145 and 175 ops.

Looks like might still the plan, but just reshuffleling the order...

"If EMB-175 aircraft (or other jet aircraft with 60-76 seats) are placed at Piedmont Airlines, then effective on the date the first EMB-175 (or other jet aircraft with 60-76 seats) enters revenue service, pay rates for the EMB-175 (or other jet aircraft with 60-76 seats) and Dash 8-100 and Dash 8-300 will be in accordance with the rates found in Appendix B of this Letter of Agreement except that: "


Read carefully "OR other JET AIRCRAFT with 60-76 seat"...they will cap you with CRJs7.

Looks to me that E-175 to PDT are less likely with those bases. Now the CR7 will work very well in your current bases.