Should I join new IIITs like IIIT-Trichy, IIIT-Dharwad (Bangalore) and IIIT-Lucknow although they don't have a permanent campus and a college by MHRD?

There are some factors that you should consider before choosing a newer institute like IIIT-Trichy, IIIT-Dharwad, or IIIT Lucknow, and some of them are discussed below.

The table below gives a brief level of comparison among the institute.

• The IIITs provide an excellent structured course, which has a unique syllabus and follows the recent technologies and requirements. They are somewhat ahead in advanced concepts, compared to other basic degree courses.
• The choice of an institute depends on your interest. So, review the course structure carefully before choosing the institute. 

So, before choosing the institute, do thorough research regarding the course overview, opportunities, faculties, etc, before getting into the institute.