One of the most glitchy things in NetScaler comes whenever they upgrade something. Their upgrades are not very backward compatible, and sometimes they mess up, and we'd have to speak to someone. Also, Citrix is limiting their support for the load balancer to their legacy customers only. They are not providing the services to new customers or clients. Citrix is changing its business model.
We also need more things on a DNS-based system. For some of the new DNS, the features that can be included would be good.
Moreover, the solution should be more user-friendly. If one implements it once, they will get all the dos and don'ts. But first-time users would not know. And the documentation has limits and gaps. First-time users need to go to the support team and get their expertise to get it done.