Do not compare lite fighter F-16 (up to 20 tons MTOW, 1 12-15 tons engine) to ultra-lite Tejas (up to 15 tons MTOW, 1 8-10 tons engine), they are in different classes and weight categories.
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This is only a first-look concept.
They are always some ugly, but show the general way of thinking and a general idea behind it.
Yes, this concept is premature and lacks detailed work-out, but it shows the authors idea.
No, this concept is not mine.
However, this design makes sense as modern FCS can afford to avoid the excessive control surfaces when the extra-maneurability is not the main option for the project.