Merlin VSM issue: advice for a newbie

Hi,

I just bought a pair of the "mythic" Merlin VSM.
I'm a newbie and measurements and I would like some advice please.
A good friend and member of this parish gives me his thoughts, and I'm looking for other ones to confirm.

First of all, I'm not a pro in measurements, first time. Measurements have been done using REW+UMIK (calibrated then).
1 m, tweeter AXIS, mike between tweeter/woofer.
In room, no window.

Issue: when I came back home, plugged the speaker I directly felt something wrong in highs. Nice bass, nice medium, too much medium not enough highs.
They have the Esotar tweeter, supposed to be one of the best, so disappointing ;-)

OK enough blabla, find some graphs below, and please don't hesitate to ask me other or teach me how to make it right.
My goal is to understand what is wrong. Tweeter or crossover?
Thanks

So you have both of Merlin (2+3)
I sent a 5000Hz signal to tweeter to check SPL
I compared with my Sonus Faber Electa Amator II using the same boomer.
 

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I try to find the tweeter issue,
At this point there is few options:
-something wrong in crossover?
-ferrofluid can be sticky hence the efficiency drop,
-a mix of both
-tweeter are dead (measured resistance around 5,5ohm)
I just want to be sure about what will be the next step?