Your fork will have coins pre-distributed so you don't have the problems with early adaptors.
You might be overlooking the obvious.
The spend transactions from the "pre-distributed" coins would be valid on both sides of the fork. Thus if bitcoin is trading at $90, let's say, and you are asking me to pay 10,000 ?TC for a pizza then I'm certainly not going to be using my pre-distributed coins and instead would only be using ones whose coinbase occurred post-fork.
And even putting that aside, you've got a fork that is extremely vulnerable to 51% attack.
I don't understand your objection. The coins that are valid on both sides of the fork have nothing to do with each other. They have no effect on each other. If you spend 10.000 ?TC of pre-forck ?TCs, it has no effect on your bitcoins.