There was a time when PvP was worth nothing other than the bragging rights and a measly old DV shift. I think we can weather one server with no points for line or command variants with less than a move cost of one to be worth nothing again.
Besides I think your argument is predicated on a false notion. It's not as if the solo low move cost ship is looking to PvP. By your own admission, you'd seem to suggest that the solo low move cost ship are likely to be non-PvPers, e.g. hex-flippers. So there is nothing that precludes that solo hex flipper from being bumped out of hex by a bigger ship. I did it many times today, and had it done to me as well. That's what the disengagement rule is for and that is indeed the answer to any hex-flipper, forcing a disengagement. As soon as I see gaggles of folks in low move cost ships slicing through BCHs and Dreadnaughts like a hot knife through warm butter, I'll worry about it.
Right now you can PvP in a CA, BCH, DH, Carrier, or other specialty ship. That's a fairly substantial portion of the ship list and consider the server population size and the extravagant number of metal points allowing a notable number of people to field 2 DNs and a Carrier (a 1/3 of the players on one side) or 5 BCHs (half of the players on either side). That's half the players on either side in a cap ship, HALF, which most can easily afford and the rest in CAs or commander cruisers. So, it's not as if there is a dearth of PvP opportunities and ships to scores points in.
Further, further, (Yes, I meant to say "further" twice. It's for emphasis) these low move cost ships are in fact not worth nothing if not flown solo. They are worth one point. So, there is a tiny little exception for hex-flippers flying solo and as they are flying solo, this is easily countered by the disengagement rule.
Now, what exactly is the complaint again? If Stargazer kills you in a CWLP, he should get a point for that?? Done. New Dizzy rule. Anyone killing Dizzy in a low move cost ship solo gets a point. Happy now??