Sorry to hear the subs didn't work out for you, and good luck with the full range speakers. One advantage of subs though is that those last 10Hz at the bottom can add a lot to the soundstage and ambiance. I've always preferred using subs, even on pretty full range speakers. Two subs are usually better at smoothing out the in-room bass response. A low x-over helps, but one main problem with subs is in the time domain: unless you have them next to your speakers, the low bass will arrive at the listening seat at a different time and confuse the sound. One option I've tried and enjoyed is the TBI (VBT) subs which are small and quick and can be placed beside the mains without dominating a room (see 6moons review).
AS you've experienced, the listening room is often a great obstacle to great bass. After experimenting with dozens of sub setups since my first M & K sat/sub system 25+ years ago, I've finally found bass satisfaction using a Tact system and Lyngdorf corner subs. It allows the monitors to be way out into the room (where they sound and image best) while the subs benefit from the gain of corner placement, all time aligned and with the bass humps and dips evened out. With the bass reasonably flat, the monitors (mids) can shine....
AS you've experienced, the listening room is often a great obstacle to great bass. After experimenting with dozens of sub setups since my first M & K sat/sub system 25+ years ago, I've finally found bass satisfaction using a Tact system and Lyngdorf corner subs. It allows the monitors to be way out into the room (where they sound and image best) while the subs benefit from the gain of corner placement, all time aligned and with the bass humps and dips evened out. With the bass reasonably flat, the monitors (mids) can shine....