I have flown the BWT since day one, it was my first ship in back when I was in OSI was my trusty dusty when I was a Inde Hessian, has been a mainstay in my Junker Smuggling fleet, and did some work for me as Outcast running Cardi or a LPI Stopping cardi. So I like to think I know my way around the old BWT.
That being said:
The old one handled like a dream and slipped in and out of lanes like it was part of them. The new one has its moments, it certainly isn't as slim as the old one but overall I like it. I do agree that it needs its firepower cranked up as currently it is very much so lacking. It can shoo off NPC's well enough but against players it wouldn't stand a chance. I also will not deny it certainly feels more sluggish then the old one, though I will admit it could be a result of the size of the ship and how it looks when it turns.
TL;DR: The current one takes some getting used to handling wise to but It can still slip in and out of lanes with the same finesse the old one had you just have to get a feel for it.
Ps: I love this new model, the Cargo Pods make it so much nicer and more customizable in conjunction with the engines. If we could crank up the power and get more selection of pods that would be excellent!