Hence the first sentance of my post. Obviously you dont get behind someone who isn't fully committed, TNA needs substantial consistency as much as anything.
Absolutely. Now, more than ever too, in this new "era" of the company coming out of what was arguably it's darkest (2010-2012). The fan perception, the ratings, etc. are all in the toilet, which is why this reset button needed to be pushed in the first place. The next step in that line was consistency, which we're also seeing, ultimately followed by (as a natural order), the berth of new stars.
Now, I get that Lashley isn't "new" in the sense of being a face fans in the company haven't seen before, but he
is new in the sense of being the type of guy, like Angle before him, who can come in with an existing level of stardom, at the right age (unlike Nash or Hall or the like before him) that TNA can build on and establish a long-term legacy with. Angle, for example, is largely seen as a "WWE guy", but what a lot of fans may not realize is that he's actually now spent equal parts of his career in TNA (eight years) as he did prior in WWE. Jeff Hardy is in a similar position as well. So yeah, while you may not change every mind, you can still use existing talents who dedicate themselves to your company as a jumping off point.
I'm in the same boat you are here, too. If he's committed to TNA, TNA should commit to him and push him to the moon. He may lack in the vocals, but he has the look of a dominant main event star, and as Jeff Hardy can certainly attest to, since when is a lackluster ability on the mic a hinderance to stardom?