meh, it is just worth nothing, it lasts only some seconds, and if your enemy is better than you, it wont save you.. Vasari has other way better OP tools like phase missiles, titans, jumping orkulus of doom, etc, this is never used anywhere i think, this BJ (lol it may be better not to use this, as it has another well known meaning ) the enemy fleet will reach you no matter what you do, how many things you have.

240 second cooldown and 45 second duration.  To have the 50% hyperspace speed penalty, you'll need at least 6 and good timing.  Not the best way to defend a world, but certainly the most annoying -nice however on long distance jumps so you can get your orky in position.  Changing the duration to 24 seconds might reduce it -or increase the tactical slot count for the PJI.

and

Worth nothing=> just annoying, (maybe I should focus on my composition of words next time), as it doesn't really change anything, VR is banned from online games even these times so it doesn't really matter anyways yes I know the durations and such, but still Vasari has better stuff to use resources on.. 1-2 minutes delay is not a huge gamechanger... and i dont really think this strategy would be fair, if people start to use this VR will be banned for another reason LOL, and VR is so OP even without this...

If you have nothing better to say its not good.. like the mindless jumping starbases of which there are 3-4 awaiting its fate of jumping, or the even better phase missiles, or the no antimatter jumps in friendly territory..

Ok change it's duration to less seconds or change speed penalty but it will be even less useful I honestly used this once and didn't like it, although i never play VR (as I don't like OP factions, so much challenge winning with them..), and if I face one, I have way more serious things to worry about, like the stupid starbase rush strategy, or just the idiotically powerful late game fleet of the Vasari, or the both unstoppable titans of the 2 factions... First fix the major issues, after this you can maybe focus on small stuff like this.

PS: I never saw anyone blaming Bidirectional Jamming OP-ness, because they lost the game because of this, it is more likely people lost game due to Titan or starbases..

If Bi-Directional Jamming increased the tactical slot count of the PJIs as a secondary effect, then that would solve it.

Only reasonable change would be to change the numbers, speed penalty OR duration.