WTRW needs to maintain a 70dbu city-grade signal over Carbondale as that is the City of License. If moving too far south you would need to find another station to change COL to Carbondale as to maintain a first local service in that city (I think WCIN was at one time licensed to Carbondale but is now licensed to Tunkhannock). There are translators licensed to Carbondale but they don't count as first local service.
Moving south would cause a short spacing with WQKX Sunbury which is a 50kw Class B on 94.1. According to the rules WTRW and WQKX need to be 137km (85 miles) apart; from what I call tell the towers are only 82.8 miles apart. IIRC, years ago 94.3 (which is now equal to a 6kw class A) was 3kw and upgraded when the FCC approved Class A's to be 6kw. Anyway, the only way they could move south is if they used what is called contour protection whereby you can show that, even if you are short-spaced, you wouldn't cause interference to the short-spaced station (this can happen when you have a big mountain between the two stations that blocks the signals getting through); this may be the case at present as the stations seem short-spaced already. A directional antenna could also possibly be used. None of this takes into account 94.5 Nanticoke which someone mentioned prior.
Going on the WWRR tower would shrink distance between TRW and WQKX to about 67 miles.
Here is a scenario as to how WTRW can better cover Luzerne County: Use 1340 WYCK to simulcast WTRW. Then 94.3's format ends up on the new 99 watt 100.7fm Wilkes-Barre translator W264CG which is listed as rebroadcasting WYCK (co-located at the WYCK tower site). WTRW cannot simulcast onto 100.7 without using WYCK as WTRW's 60 dbu contour only goes as far south as about Avoca, and you can't extend your main signal beyond the 60dbu using a translator, but an AM can simulcast any FM, so in effect you could have 94.3 WTRW> 1340 WYCK> 100.7 W264CG.
Just some random thoughts.