Creating a new person or company directly from inside an activity is a very efficient way of working - like if you on the phone get a new name with phone/mail - you can just write the name there and it gets created and linked to activty and company.  

But it would be better if the Add new person dialogue poped up so I could directly enter al the information like mail and phonenumber - so I dont have to firsta add their name, then close activity, search up name, enter phone and email, search up the activity again, open it, klick "Invite linked peoples" and firstly there invite them to a meeting.  

 

Also the ability to create a Deal directly from inside the Acitivty would be immensely helpful - similar user case.