Wouldn't that be a reasonable way to keep old Trial content relevant? Have the trial bosses dropping TV stones so that raid guilds can still keep their gear at V16?
Not everyone wants to pvp in IC, but this way the trials can still be viable for people.
Failing that, maybe each town should have a Travel Exchange NPC - whereby there is an exchange rate between gold, tv stones, alliance points, champion points, crown store points etc. Let people play the game the way they want and then swap their gold for TV stones, or use their 1500 monthly crown store points to buy alliance points etc. As long as the rate is reasonable, why not?
Some people are crafters, some pvp, some solo pve, others like group pve, group pvp or raiding etc. Why not let folks do as they wish and simply exchange as they want and content need not go out of date