I do like Mooer stuff, and that would certainly be one possible solutions, but what are you missing?
Well, the BigShots can work perfectly well in passive mode and can therefore be used anywhere on stage, without the need for power and/or a pedalboard. In fairness, that means that the LEDs won't work, of course!
The BigShot is also available in two different flavours, the BigShot I/O and the BigShot ABY, allowing you to choose exactly the feature set you want for your needs. Both BigShots have a dedicated tuner out.
A key difference between EUB and DB (for live use) is that a DB does not have a volume control. The BigShot I/O assumes that you will plug your DB through channel #1 and your bass guitar through channel #2, then use the DIM/BRIGHT controls to equalise the two signals without altering your bass's volume control and therefore its tone. It also has a Mute button (very handy for switching between instruments, especially when one is a big noisy feedback-prone thing which must either be laid on the floor or placed in an awkward stand).
If you're playing EUB rather than DB then the BigShot ABY probably makes more sense, and of course it is a direct competitor for the Boss LS-2.
As opposed to the Boss LS-2, the Mooer has a (reversible) 2 --> 1 plugging system whereas the Boss LS-2 has a far more flexible 1+2 --> 1+2 system. Equally important is that the LS-2 has separate Level controls for each of A & B. And whilst the LS-2 needs power, it runs very happily off a 9V battery.
I think that's about it.
Whether or not that makes the two BigShots worth £89 (each!) or the LS-2 worth £82 is obviously an individual thing. If I already owned neither a BigShot nor an LS-2 then I'd certainly look at the Mooer as a starter for ten - £25 is a good price. But you get what you pay for.