Ehm... nice idea... but I wouldnt go that way (just meant for this
post)... because EVE canon isnt so much fantasy (ghost poster was faster)
Why I mention fantasy?.... It is how can I put this.... It is alomst a "natural law"/scientific law that militarys are in equipment and weapons most of the time forward working.... It comes from the pressure of reality... that you cannt field some "awesome warriors" with some old school weapons like the old schah from persia... which had love in the 70s all the antic stuff like shields and chariotry, but in the military isnt any use of them..... So what happend, they become some toysoldiars for parades. On the other hand the "military"/"high command" had always pressure the Schah and the USA, to get the "best"/"up to date" equipment and weapons (from the US).
Thats why many solars in the 70s thought.... military regime would be more likely to be modern/advance their countrys... and would be in the longrun more stabil and leadtheir nations in the end to democracys etc.. (like RoC, aka Taiwan).
Of course this Idea is since the mid and late 70s more or less toast/falsified tru reality (again reality, bad reality
).... but still... the rule is: A military which isnt up to date is more likely to loss; so the internal pressure for modernisation is in the military itself still working.... (but not for society as whole).
Thats why I think... or lets say.... I love your Idea, but also think it doesnt fit for EVE. If you dont want a "toy army"/parade army" - or play as RP as one Toywarrior.
I would go with some culture excuses, why you fit the old weapon...
Still overall I love this Idea.... rock it (maybe I add in my little story a section than about the cyperknights/cyperninjas. It would awesome