It’s possible to make a change that helps emulate the experience of tbc for today’s player base.
As a simple example of changes made to attempt to make player behavior similar to back then.
If they did nothing 80+% of every remotely serious raiders would be leather workers. Because we now know that LW without those changes would be the biggest dps increase for the raid, and by stacking drums it would be the biggest dps increase for personal dps as well.
Back in actual tbc the percentage of LW was nowhere near 80%. The changes made were made to drums (and other profession changes) were made to try to make player behavior more closely match what it was in tbc in terms of proffesion choices.
Changes can be made that are in line with the intent and design goals of origional tbc. Bug fixes fall into this category as well. This is not a contradiction, you can be against some changes and for others based on how they interact with the design goals and intents of tbc.
It’s not a black and white choice of no changes or all changes.
Now in terms of dual spec and the design goals and intents of origional tbc, we know they said NO to any form of multi spec like dual spec and gave their reasons as to why. We have very clear evidence dual spec did not fit into the design goals and intent of tbc.
But you know all of this. You also peace mealed my post to make it seem weaker, which just proves you are being Intellectually dishonest.