For those curious, I did go with sword and board (now level 5). DM did allow me to change to Dueling. I took Shield Master...sometimes useful, sometimes not. I've just found a frostbrand handaxe, which I may switch to instead of the magic sword.
Sivashor I do like your suggestions. I may need to take a second look at Menacing Attack.
I played a Battle Master archer in a Princes Of The Apocalypse game, and Menacing Attack worked REALLY well. Imposing Disadvantage on attacks is not to be underestimated. The battlefield control aspect of the target being unable to move closer to you is nice, but I actually think that part of it works better from range. If they're up close with you already, it's not like they can get closer anyway, and it's a lot easier for them to just circle around you. For a melee Battle Master, I would also consider Goading Attack as a possible alternative to Menacing Attack. It targets the same saving throw, but it doesn't impose a condition the target could be immune to.