There are many changes in this new XenApp version, i.e., XenApp 7.5
1. We can not limit the instances of application allowed to run in server farm or limit only one instance of application for each user.
2. The load evaluator has moved into Citrix policies and it cannot be applied to specific applications anymore.
3. A RDS host (worker node) can only belong to one Delivery Group. If your delivery group with Application1 has the 10 servers, you can’t assign any 2 of the 10 servers to another delivery group with another Application2.
There are lot of features missing to avoid complexity of the XenApp architecture and to merge XenApp and XenDesktop products. Below is the easy steps to install and configure XenApp 7.5.
MyXenApp 