1. Equal numbers of men & women participant in the beginning of show..

2. Eviction should start from 2nd or 3rd week.. let audience know the contestants..

3. BiggBoss should not give nomination power to only some people unnecessarily.. like they gave the boys a couple of times in this season..

4. Every week's nominee who surviveđ with highest voting (topper), can directly nominate one contestant..đ
5. A contestant who is nominated 4 times and survive, must get relief for next week

as an award
and he can directly nominate one contestant..đ6. BiggBoss should be more strict
in implementing rules and make sure they are followed by all.7. Serious allegations on somebody's character..
..family abusing should not allowed.8. Hosts should be neutral..đł
9. A compulsory 'secret-room' ..

10.
Speaking in English or in other languages than Hindi strictly prohibited 
10. No double beds..

11. Not just sleeping but even lying around should not allowed in day times

12. BiggBoss should lock the bedrooms to punish those or all contestants..



13. Jail should be a lot worse
than it is today. Prisoner should not be rewarded for being 'good' in prison, but should be punished for being bad in the house
I remember.. in season 3, how BiggBoss jailed Rohit Verma in a big 'bird-prison' hanging over swimming pool for hours


14. BiggBoss should make daily/weekly tasks more interesting than childish tasks like school task, being a child task given in 1st or 2nd week, being a pet task given in season 4.. Khali as Pet was very disgusting

Though 'Raajneeti' & 'Jail' were really cool tasks in this season..đđŒ
Agree, there is a limit to attempt 'Khatron ke Khiladi' type outdoor tasks in the house, but they can attempt tasks like "Minute To Win It', a very popular game show of AXN TV.
It has simple but very interesting fun-tasks usually played with household objects, in less than a minute. (Must Watch)
Better task is one of the main reason behind any reality show's popularity & therefore channel's TRP

15. Omit swimming pool from the garden area if participants are not using it regularly
Otherwise make it indoors with warm-water facility
b'coz..people want to see
some good figures-n-bodies
to get inspire for health & fitness 
16. No contestants after two months.. guests are welcomeđ€
17. People who are bad role models to our society should not allowed..

18. Only three finalists.. not even fourth..

19. They should throw a party after finals, in which they can invite past season's winners, all the current season's contestants and hosts from all seasonsđ„ł

Additions:
20.
Daily episode should telecast for 90 minutes instead of 60 to give equal footage time to all the participants.21. Open nominations
..at least twice in the season.