I have to say that it's about time you finished, and it's great you did everything you could to finish this series. Several animations of one whole series with voice work couldn't have been that easy. It's quite difficult for works like this to be considered decent despite not being AAA material. That still doesn't belie the work you put into this, and for that you deserve a lot of credit.
This was just incredibly bittersweet. It's all too easy to want a happy ending, but not all happy endings carry such an emotional impact. Betrayal, survival, and friendship are things that are definitely quite a punch to people when you work them into one. How Xero was forced to kill Omega at the end and live on his own. How Xero was finally going to join his friends after one last fight and leaving someone to fight for him in his place.
Really, it's says a lot when animation on a budget can still put a tear in your eyes, especially after all the action and fighting and the amount of testosterone in these works. I think the only thing I can criticize is how the voice overs were often drowned out by the sound effects, but it's not that bad an issue.
I honestly wish you continued to do more, showing the new character taking on the mantle of destroying the one responsible for this new world order. But that's on your own time and when you feel like it. Still, it's quite an amazing end to the series.
Congratulations on not only finishing it, but once again making the front page. You've earned it.