once again comments assume miner/exchange cohesion continues

"but who cares about the name"  

I am currently "modeling" the Bitcoin world as a giant mass of relatively algorithm-unknowledgeable folks that are excited by the legacy winning cryptocurrency that they know as Bitcoin and a much much smaller group of people that know the difference between a Merkle tree root and that damn thing in their back yard.  The name like any brand, conveys longevity, success, good word of mouth, lower risk.  People that aren't super knowledgeable care about brand names because they are aware of their lack of knowledge.  Even knowledgeable people can sometimes care because they know of the force this has on mass quantities of other folks.

Alt-Core-Bitcoin is going to need a carefully selected and tested new hash algorithm for its proof of work, a new name,  a lot of organic uptake, and a successful effort to get back on the exchanges (or cool effective new alternative for exchanges) and new merchant arrangements as well.  This is not a trivially easy slog. It won't be quick. Don't forget that