I don't have time or inclination to get into a debate about the merits or demerits of whether something is an exploit or not. But regardless, just because something has been around a long time doesn't mean it's helpful to the game design, which is really my only criteria here. Does this make the game feel more interesting and balanced all around, or not?
Does this allow players to circumvent a large part of the difficulty of most scenarios if they know this one trick, while making it really much harder for anyone who doesn't know the trick? If the trick is suitably obscure or counter-intuitive, or sufficiently glicthy-feeling or overpowered-feeling, then trick probably needs to go, and then everyone is on the playing field. "This strategy always is best" strategies are always going to be nerfed around here.
Beyond that, if the nerfing of such a strategy causes too much hardship, then either:
a) the player was potentially playing on an inflated difficulty level and needs to either adjust the difficulty or find a substitute strategy now that this crutch is gone; or,
b) if this is affecting a lot of folks and generally making the game harder for even people that didn't use/overuse the direct trick in question, then something else needs to be done to compensate.
We've increased the health of forcefields, increased the forcefield cap, increased their effectiveness against teleporting ships, and added a hardened line of forcefields. And solicited feedback on balance. To claim we've given nothing back is disingenuous and unhelpful. If there's something specific that you want to see added in counterpoint, please let us know what it is and I'm sure everyone will weigh in. If it's popular and makes sense to everyone, it's in. But we're relying on other folks here to do the playtesting and let us know what they think at the moment, and if nobody says anything then there's not much we can do.
Right now the only suggestion raised has been about short-range ships losing their penalty while being under forcefields. So now the question is what constitutes "short ranged." If there's something else you feel that needs to change in addition to or instead of this (AND everything else we've given to players in counterpoint to the recent changes), then suggest away.