My table at home has simonis on it but after a few years of heavy practice it is playing pretty slow. I have resisted changing it for the very reason OP started this thread.
I firmly believe that slow cloth improves your game. My table has pockets that are reasonably tight but the speed of the cloth makes them even tougher. When you have to shoot firmly the pockets tighten up, and if a ball scrapes the cushion coming down the rail it picks up reverse spin and bobbles out as opposed to sliding in. To make it even more difficult you really have to account for the curving path of the cueball any time you roll a ball with english, whereas on freshly set up diamond pro tables the cueball slides all of the way to the object ball. I feel that practicing on a slow table forces you to acquire good angles, a strong stroke, and a lot of feel for these reasons.
On the occasions that I do get to pro tournaments I have never had any trouble adjusting to the equipment. Because my rails are lively I still play for similar angles, I just get to hit the balls more softly (and I have never had any problem with my touch). My accuracy improves and the pockets are much more forgiving. It is like going to a bar table in that layouts that would be very demanding on my table become a shoot and stop proposition. Playing world class competition is demanding enough mentally, it is nice to have the physical game seem easier.
This assumes that you use balance, meaning that of course you have to play on a variety of equipment. If all you do is play on tight pockets you can lose confidence and mess up your shot selection by skewing your percentages. I think it goes without saying that you must log hours on the equipment that you wish to compete on. That said, I would encourage our original poster to stick to his guns on this one.
One afterthought on this is that if you already have a strong stroke and are lacking finesse it might make more sense to have a quick cloth. For my, I have always had a soft touch but used to lose accuracy quickly when I had to shoot firmly. Slow cloth became one of my best allies in developing that skill.
***EDITED to add this comment: Slow is relative- my cloth is still simonis, it is just old and tired and nothing like a new table. If you play on shag carpet on which draw is impossible from half court that may be going to far.