I totally agree with you that opposition parties can make a president's job difficult. The GOP and President Obama has had their fair share of battles during his years of presidency. Depending on which side you're on, it can be very tedious and stressful to make changes in a divided country. This can be a blessing or a curse because powers can be abused if the wrong officials have overall control of these decisions.
I agree that it's hard to get bills passed, but it's also a gamble. Allowing the president, that you like, have the most power may be benificial at the time. One thing to consider is what if these rules were in place and a president that doesn't have the same views as you or your party, this can ultimaltely become detrimental