That's terrible logic for balancing stuff.
If you use that logic you can remove all offensive skills from WHM's and then claim "It's an MMO, get someone else to help you!"
As it stands, Topaz Carbuncle/Titan-Egi exist in the game. They're useful to the players who find uses for them.
Removing them because YOU simply want to make Summons boring, seems silly.
Well... You just disproved your own point... Garuda with Contagion management is the highest rDPS.
Ifrit is better if you don't utilize Contagion well, or at all.
That's 2 distinct summons to use. Compared to what? "Putting the focus onto Summons" by actively removing choice of summons and making new Demi's be auto-attack bots?
At least Bard's songs have impacts on your actual rotation when you use them. With WP getting you to use Pitch Perfect when it stacks up and with MB giving you the Bloodletter/Rain of Death resets.
It sounds like your suggesting that "Demi-Summons" become basically like Army's Paeon, ever BRD's least favourite song because it's simply a passive boost to damage (Not even particularly good comparatively to other Songs too)
Or... They could not make Summons auto-attack bots?
You know... Like in my suggestion? Which has the focus on Summons, including 3 basic Summons to utilize between summoning Demi's. Which has room to keep them having their other attacks as well as adding in new ones to activate (Much like how we make Bahamut use Akh Morn currently)
Well... That's literally the point that I was trying to address with my idea in my Original Post.
I recommend you check it out.
It does everything you're looking for.
It puts the focus onto Summons.
It enables you to empower your Summons (Via Rouse which is tied into Dreadwyrm Trance as well as Enkindle which is on a lower CD)
It lets you tell your summons to use abilities (Via use of your own abilities, mitigating the low potencies on your own skills by having the rest of the potency brought by your summons)
It lets you feel like a Summoner more frequently, by letting you summon a Demi every minute and Bahamut every 3 minutes (Meaning a total of 4 Demi's per 3 minutes) - Without having this "Perma-Demi" style that would devalue the impact of summoning a Demi-Primal to the equivalent of a BRD swapping songs.