If the BTC transaction fees will go down I guess those people who left BTC will come back. We know that some of the user of BTC left because they say that BTC transaction is not fair enough. If this will really go down the increase of users will go high. We all know that there are a lot of crypto currency and some of the investors really look forward to the transaction fees because this thing really matters. As the competition of crypto currency increases the chances of decreasing the fees will surely follows thru in order for the crypto currency to survive with the competition.