I may be obviously biased, but I think it's fine as-is (reduction in synthmuscle amount may be warranted, though - maybe 10 to 4?). It's OP if you're still at HQ stage, sure. But I only saw that once (that is, synthsuit at HQ) when I couldn't beat RD in time. So, that was somewhere around mid-99 - not exactly perfect timing. Past-99 you can get PSI/Power suits/Spatanism, which are better at what synthsuit does - assaults and hit & runs.