Went back and looked at how the tonnage numbers were calculated. I'm not sure 2,600 t estimate is the right direction.
The MEKO 100s have a calculated full load Cb of 0.465; alright for its speed (24kn), but pretty chunky for any small craft intended for higher speeds. Would expect Cb to be in the 0.380 - 0.400 range.
Now draft is unknown, but basic hull design says its likely in the 3.1 - 4.2 m range with a tendency towards the middle. That makes the expected tonnage range between 1600 - 2300 ton range if the satellite length/beam are true. It could be more, of course, if we take draft at 4.2 and Cbs of 0.420 - 0.460, then it's in the 2400 - 2600 tons range. But that's an extreme end and if we shrink the draft, we just get an even higher Cb and thus even more chunky (and less propulsively efficient) ship. A beam of 14 m is already pretty wide for it's length if it's meant to be a relatively fast ship.
So I think it's more likely in the 2000 ton class and given the VLS and enclosed hangar, even more likely to be a relatively slower ASW-focused ship. Maybe a preliminary estimate of 25-28 kn.