multiple stored procedures

if i had multiple procedures as mentioned in the code, for the code maintainance purposes, can i just take the block of code in each of the statements into multiple begin and end blocks, so that all the required code for this task stays in one single stored procedures, instead of 5? and also what are the disadvantages or the pit falls of doing mutltiple begin and end block way.

  ALTER procedure usp_masterproc
  as

  DECLARE @ErrMsg nvarchar(4000),
  @ErrSeverity int  ,
   @errorNum int

  Begin  try
  begin transaction


    exec sp1;
    exec sp2;
    exec sp3;
    exec sp4;
    exec sp5;
    exec sp6

   commit;
   end try

 begin catch 
 if @@trancount >0 
 rollback

           RAISERROR(@ErrMsg, @ErrSeverity, 16)  
           SELECT @ErrMsg = ERROR_MESSAGE(),    
         @ErrSeverity = ERROR_SEVERITY(),
         @errorNum = ERROR_NUMBER()

PRINT 'Error Number: ' + CAST(ERROR_NUMBER() AS VARCHAR); 
PRINT 'Error Message: ' + ERROR_MESSAGE(); 
PRINT 'Error Severity: ' + CAST(ERROR_SEVERITY() AS VARCHAR); 
PRINT 'Error State: ' + CAST(ERROR_STATE() AS VARCHAR); 
PRINT 'Error Line: ' + CAST(ERROR_LINE() AS VARCHAR); 
PRINT 'Error Proc: ' + ERROR_PROCEDURE(); 

END CATCH