Is this still a viable tactic? Looking to get back into this over the winter break. Had some fun times sneaking in 15 or so siege frigates to my enemies' home planets while engaging their fleet on their border, but I haven't played since the big siege frigate nerf.
I hesitate to call it non-viable, because you can in fact knock out enemy worlds with it, but it is not as easy or cheap to do as it was in the early patches. I have had people use it against me and sometimes they get a planet or two, but I usually kill all their siege frigates which is a pretty big cost to the attacker. The other downside is that your main fleet will be a lot weaker since you are building siege frigates instead of combat ships. I think there are effective siege frigate strategies still, but the days of suiciding siege frigates to kill planets are over unless the attacker has a much larger economy....in which case, they can kill someone anyway they feel like.
I can't comment much on Subversion vs Embargo. They are both rush tactics that I almost never use, so I haven't compared the latest version of Subversion.
I don't think I ever actually sent 15. I sent about 8-10.
I'm sorry to hear that, though. It was a bit cheap, but the real problem was that siege frigates could get past border worlds too easily even if they were well-defended, not that the frigates were overpowered. What was needed was better border control, not a nerf to the siege frigates. Devs, are you listening? I really hope you're listening.
Also, please consider buffing Subversion. The difference between the two skills is just stupid. Embargo is WAY better in EVERY WAY. Maybe give Subversion a twist to make it different, because right now they are the same except that one is much better. Subversion could dramatically increase build times while Embargo steals their $$ and decreases their income, or Subversion could make ships be built much slower or with half health, or something.