Don't think You can gig with it, as to home practice - it's ok.
In your earlier post, quoted above, you didn't specify a particular style of music nor a venue nor anything else to support your contention of inadequacy. Therefore I didn't specify any particular kinds of gigs either.You can't absolutely say so, because there are different music styles being played in different volume levels, where this minimark can be heard or totally unheard and useless.
I can "absolutely say so" because I have gigged this Minimark many times in small venues with as many as 14 other players (strings, percussion, horns, et al.), played jazz standards gigs and jams, acoustic and electric folk/Americana, relatively low volume blues, et al. I've used it in a theater orchestra gig where low volume was essential because I DI'd to the board. Not every gig calls for a rig that throws shade on Metallica at the Rosemont but if that was my calling I'd show up with appropriate gear.