1st of all… a Bhaalgorn might not cost a whole lot, but is extremly powerful and deadly in 1 v 1s or even small gangs if you invest into some decent modules combined with implants like asklepians and drugs for tanking.
Due to the role bonus, combined with the bonus / skill level to Nosferatus it not only is able to suck dry multiple ships it is facing, but at the same time can maintain its capacitor to easyly run 2 x-type reppers indefinetly… combined with a cap booster even under some neut preassure itself it´s not a ship that is going to get killed easily.
At the same time (as mentioned above you still reach around 1K dps and have the slots available for 2 webs with enough range to web any ship trying to tackle it unless it has a hull bonus to tackling range. However ships with the range bonus are still easily within range of a bhaalgorns pulse lasers and to web bhaalgorn down to keep it from escaping trying to bump it is quite the suicide mission as well.
In short: Do not mess around with blood raider ships :). And the Bhaalgorn is a pretty good example of a totally overpowered solopwn mobile and as much as I love that ship and always enjoyed flying it, it honestly should get nerfed
As for the escaping part. It would not really make a difference as engaging itself triggers a 60 second weapon timer when engaging preventing you from docking / jumping, just like the bastion timer.
edit: Just to clarify… If you engage into PvP with a marauder you don´t just sit there with your bastion module active either, you activate it when you actually engage so in regards to the timespan until you are allowed to jump / dock there is absolutly no difference if you engage in a marauder or any other ship.