You are very wrong. Buffing a SMNs single target does not invalidate BLM in any way. It's simply brings it even in the playing field. The bias you seem to repeatedly present is clouding your judgement on what SMN needs. Tell me, were you also against a buff in SCOB for BLM? I ran with several BLMs in both in static/sells and many I knew crushed it on SCOB to the point where I felt Potency was not the direct solution in the long haul for that class. Does that mean we should ignore the glaring issues that plagued the class regarding the excessive movement because the fights could be cleared?
Btw there are ways to control the increase in SMN damage that are not hard to balance appropriately or destroy where BLM is right now in the end game environment.
If it's Potency, Garuda, Fester and Enkindle are safe bets.
Fixing the MP problem also would add DPS.
Nor did I imply you said as such, but your rational on proper balance adjustments seems to be lacking, which is why I gave an example you may understand to better articulate the point you couldn't be more wrong on your way of thinking.