In Maharashtra, tenancy rights are regulated under the Maharashtra Rent Control Act, 1999, which repealed the Bombay Rents, Hotel and Lodging Houses Rates Control Act, 1947.

2) there is no amendment being made to mahrashtra rent act at present 

3) Affected occupants/tenants shall be given alternate accommodations in the form of
P.A.P. tenements/ galas.

4)On request of eligible occupant, AC Ward after obtaining sanction of competent
authority may issue the certificate about carpet area occupied by the eligible occupant and
may be shifted on temporary basis so as to protect his tenancy right while redevelopment of
the said property at occupant risk and cost. Agreement to that effect with the MCGM, owner
of plot and occupant shall be executed in consultation with legal department.

It will go to legal owners.  However the case been pending they are still not proved legal tenants

Shop no. 1 - for properties controlled by rent control legislation, no such standing committees are recognized. If the tenants have any grievances against that landlord, they can approach Small causes court or the BMC or MHADA If building is under Mhada. The other portion of your query is not possible to answer since no lawyer can predict about any such law and when or if at all it would be passed. It's too far fetched to expect this from any lawyer

Shop no. 2 - the BMC commissioner is wrong. The dispute in small causes court is between landlord and tenant and not between rival parties claiming ownership rights. So he has to pay compensation for the road cutting to the owner who reflects in BMC records and who holds a valid registered title document in his name

In pagdi system also the owner remains a owner and tenant once and shall remain tenant forever, until the property goes for redevelopment.

There is no such law passed or there is a proposal to pass any such laws by the government as mentioned by you, yet.

As far as own shop is concerned even though the tenant as accepted to be a tenant, the corporation authorities cannot take any action in it before the case is disposed by court of law.

You may wait for the court's verdict on this for moving further in this regard.

1. if you think the rent is excessive then nothing stops you from filing an application for fixation of standard rent in the small causes court 

2.you can also directly deposit the rent in court or continue by sending money orders to landlord. If he refuses the money orders, then you are not at fault

3. also nothing stops you from selling the premises to your buyer on as is where is basis. If the buyer is so powerful then he will settle the landlord using his machinery. However the landlord may file an eviction suit against you and your sublettee in case your buyer fails to settle him 

you must make payment of rent to landlord 

2) send  cheque  by post with covering letter 

You need to pay the rent or occupy the house as per Maharashtra rent control Act it's the law

Pagdi law is not in favor of the landlords alone.

You have to utilise the circumstances in your favor.

The landlord cannot dictate terms if you sell this property to a third person, he needs only the 33% of sale consideration amount for transferring the tenancy rights to the new tenant.

You have to be bit bold enough to tackle this situation.