im pretty sure in the allied forces mod, some shivan ships can go backwards, prob is there is no hud to display speed for sliding or backwards etc.
as for the changing orders subject, if there was voice acting u could just use the same as homeworld so there is only a couple different things to say eg, "new coordinates d/l" to move (which is hell making in levels) "new target acwired" for destroy objectivs etc
only main problem in this overall point of view, is that in homeworld u tell a group of fighters to attack something and thats it, there'ry happy to die for u and follow the same procedures everytime.
however in freespace2 it targets a more realistic style that shows all of the micro management in just simple skirmishes such as subsystems etc.
i call this 'minion syndrome'
because in free2 there really isnt any minions to speak of.
so to convey a 'pure' homeworld feel too a freespace2 conversion we have to make it as simple as possible in free2 terms - however this would make the game extremly dull for players taking the role of 'minions'
so therefor we have to design it inbetween these two worlds simple enough to be homeworld and yet enough 'micro management' to be entertaining in a freespace environment
wow thats

of writing, but i think it puts a good lot of question to where the detail is going to be in level design.
PS no pressure level designers

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"too succeed is not enough, others must fail"