Tools (SSMS, Agent, Profiler, Migration, etc.)
Use an instance of the MS SQL Server Management Studio Coding environment instead of notepad for anywhere in SSIS that requires code entry. As it is, developers are forced to go to the SQL Server Management Studio develop the code and then copy it to the tiny notepad box. Considering the popularity of SSIS (and thus SQL Server) this seems ludicrous.
Improved Code Reliability
Improved User Interface