1: We're not currently considering other replacements for the Executioner. It isn't an issue of model quality as they're actually quite good, but it just isn't something we need right now.
2: We desperately need a replacement for the aging Upholder model. Replacements for the Avenger and Guardian might be considered, but it's doubtful. This would be totally unprecedented and also unnecessary, as the current models are very well balanced. If you want to model Liberty ships, you should probably focus on the Upholder instead.
3: Your next Gen cockpits look awesome, but you axed the art deco neck ridges. They're arguably not that appealing to look at, but removing them makes it look more like a generic space fighter rather than a well defined House ship, which are known for being overly stylized.
4: The four pointed wing design was much better, not sure why you did away with it.